Monday, April 07, 2014

On a lighter and less contentious note: My review of the Sigma 60mm dn lens for the Micro Fourth Thirds system.

This is the look I generally get from Studio Dog when I step 
out into the back yard to take a few casual snaps with 
new toys. She seems to be saying: "Really? No fetch?
No chase? No treats? Just gonna stand there with 
that damn, black box pressed to your eye?  Bad Dad!
Bad Dad!!!

So, I pontificated the hell out of the Sony A7s and raised the un-nerving specter of death re: printing in the modern world. Well, maybe it's time to take the angst down just a few notches and remember some of the fun stuff about still photography. Like the happiness of buying a new lens. The joy one feels when the lens performs really, really well and the pleasure of doing all this at a bargain price point. Okay. I can speak to that. 

Sigma's been in the photo news a lot lately because they've been routinely shaking up the big players in the business by making really cool lenses that outperform similar lenses from Canon, Nikon and Sony. Lenses that either outperform on pure technical metrics like sharpness across the frame or lenses that outperform the majors by being "just as good" but at a lot lower price point. A case in point is their new, 50mm f1.4 "Art" lens which is tearing up the competition in early reviews. Seems its only real competitor might be the Zeiss Otus 55mm 1.4 (but I'm willing to bet that there are a few 50mm lenses from Leica that are more than up to the challenge....).  Lots of serious photographers have lots of serious stuff to say about Sigma's 35mm 1.4 "Art" lens as well. 

And just to stay on a roll, they've been rolling out some incredible standard zooms too. 

When I shot with the Sony Nex-7 I bought two very inexpensive Sigma lenses that were made for the Nex cameras and the m4:3 cameras. One was a 19mm and the other a 30mm. Both were very good, albeit they did feel a bit flimsy. But for the prices asked the lenses were wonderful and as good as the bigger brands when it came to raw performance on the sensor.

When I moved on from the Nex cameras I also moved on from the Sigma 19 and 30mm lenses.

Now I've totally committed to the Panasonic/Olympus micro four-thirds system and after I added the (truly nice) 12-35mm f2.8 and the 35-100mm f2.8 lenses I went looking for some little niche petit bonbons to add to the system. One lens that caught my eye was the new style 60mm Sigma dn lens. All the reviews kinda gush about how great this lens is and then the reviewers seem almost embarrassed to mention the price. At $230 I figured it would hard to go wrong.

The lens is a sleek, modern art design. A paean to the new, cylindrical PowerMac? I bought the black one because I like the lenses to match the cameras but on the first day of use it was Texas-sunny and I wondered if I'd made the wrong choice and should have gotten the silver version instead---considering the heat load that is coming down the road into summer.

The lens is simple. No external controls. One giant slippery focusing ring. It's not a speed demon (which might explain why the optics are so good....), it only opens up to f2.8. There's no image stabilization inside. But so far I'm happy with how sharp the images are and how nicely drawn the out of focus backgrounds are when using the lens wide open.

I know I am guilty of grabbing new lenses and walking around in the bright sunlight in downtown Austin making images that can't help but be sharp and contrasty. Sunlight is sunlight....  But today the Studio Dog and I had a different idea for testing out the lens and we applied it. First, Studio Dog insisted we go to the park and try the lens out with some outdoor scenes; tree branches with fresh leaves, canoes, and that sort of thing. Then I suggested that we go back to the house and shoot weird little interior vignettes using a monopod. That way we could do stuff like use the lens wide open and shoot at non-optimal ISO's like 1600 and 3200. We could work with weird light. And generally play around with reckless abandon.

Here, with captions, is my gallery of test images:

My first test is always leaves and trees and the sky in the background. On the original file I can blow up all pixel-peeper style and see the structure of the individual leaves. Shot at f5.6. Works for me and I like the color and tonality. 

Studio Dog was transfixed by this ritualistic stacking of rocks out in the middle of Barton Springs. She was adamant that we go out and investigate but by the time I had my shoes off and my pants rolled up sheer was already newly fascinated by a log full of turtles sunning themselves. 

Old, weathered and scratched up canoes are a timeless favorite subject of mine. These are delicious. I should have used a Zeiss Otus on this shot instead of the 60mm Sigma but I couldn't figure out how to get one for the same price....

Amazing. Shooting stuff with a 60mm lens and a nearly open aperture means that some stuff in the foreground and the stream in the background go out of focus. Who would have thought this possible in a micro sized format....And yes, I like the colors and the, dare I say it? Bokeh. The bokeh is tricky and avuncular, wiry and complacent. With a hint of smoky oak.

Studio Dog saw the turtles and it was like a kid from a far away country walking into Disney Land for the first time. She paced back and forth alternately growling and whining at them. They ignored her which, I think, hurt her feelings. I was a bit put out that they also ignored my shiny new lens. That's just the way it is with turtles. 

 Tree. Large.  

 After our ambitious ramble we came back to the house for a mixed rice and sardine lunch. Yes, my dog loves sardines. It was over lunch as I looked around the house that I decided to test my new lens in the most domestic of settings. I grabbed a small monopod and worked on bracing techniques and zen-like photo-breathing and mostly used the Sigma 60mm lens at its widest aperture, f2.8. Above, my Tibetan stool on a wood floor next to a wall with two outlet plates. 
One of many bookshelves in the house with a tiny part of my Richard Avedon book collection. 

 Here I must ask, have you ever spent time looking at your old thermostat? Fascinating. And now that I've made a photographic interpretation of it I'm not sure I could bear to change it. Ever. It's so 1950's "Space Age." Yes, the lens focuses closely. 

A bathroom window. Looking for flare. Not finding it. 

 The boy's towel rack. Complete with Pokemon towel. 
 Baskets in the kitchen. Kitchen floor. 
When Studio Dog and I ate lunch today I was looking through one of our books on the history of western art. Were the Etruscans really the "bad boys" of the Med? That's what historians tell us. Really spirited trouble makers. 

You can tell this is the home of an "older generation" photographer because there are more framed photographs in the house than there are plasma screens or LED television sets. But I can't judge whether that is a good thing or a bad thing or if it just "is."

And what lens test would be complete without a diagonal shot of a window screen with the background out of focus?

Every day the Studio Dog and I are in battle over who will get the sacred chair. The rules in the family are that if someone is already there you can't move them. The dog seems to have radar to sense the times that I want to sit in the reading chair. I tried sitting on the floor trying to make her feel guilty. She doesn't understand guilt and sees my capitulation as an invitation to nap. Not even a stalemate....

Central Texas Book Case. Mid-first decade. 21st century.

 The grown-ups light switch. 

It was my turn to make the bed. I forgot. 

Playing with focus and the edge of my towel. The 60mm focal length is captivating. I already have the Olympus high speed version but I talked myself into this one because there are times when I want autofocus and program. But I can't recall when...

This old white chair, in this corner, is my favorite reading spot in the whole world. I can read by the light coming through sheer curtains from two, big French doors and I can see all the way down the long hallway to the front door. 

Light switch installed for the boy about twelve years ago. 

The one plant Belinda and I have been unable to kill for more than 28 years.

My assessment of the lens? Small, fast, sharp, cheap and able to do nice tonalities. Get one now for your small camera. If you are still using a monster camera you are out of luck on this front...




Sunday, April 06, 2014

The Sony A7s. Writing about this because it's interesting. Not because I want one. Yet...

Sony announced a new A7 model at the NationalAssociation of Broadcaster's show today in Las Vegas. The camera is called the Sony A7S and it will be a very interesting product for people who: a. Shoot with the Sony Nex FE system. b. Think they might want to shoot nice video. and, c. People who think they might like to shoot under very, very, very low light conditions. After a very thorough inspection of the specs it seems obvious that Sony has still (like the A7r) found very interesting ways to take out their corporate handgun and shoot again and again at their own feet.

What is interesting about this camera? Well, for starters it contains a brand new, full frame sensor that  allegedly does what many have been calling for years---it promises bigger, lustier pixel wells for much better (lower noise) high ISO performance. Instead of 24 or 36 megapixels you can step up to 12 megapixels spread across a 24 by 36 mm sensor. The advertised high end of the ISO range is in line with the newly announced Nikon D4s at over 400,000. Yikes!

If you keep up with video production you probably have heard that a big issue with using traditional DSLRs like the Canon 5D3 and the Nikon D4s or D800 is having to get all of the information off the huge sensors and condense it down quickly into the much, much smaller video files. The cameras do this by binning and by using a line skipping scheme. The issue has always been the image processing pipeline which is optimized for the creation of huge image files with HD video as an afterthought. The problem with the current downsampling schemes is that the files generated don't have the detail they could and are no match for camera with smaller output sensors which are also optimized to be able to dump their entire frame of information without the processing to downsample.

In Canon's professional video line cameras like the C100, C300 and C500 use sensors that have limited the megapixel count to nearly the exact count of 4K HD. These cameras can write frames to memory without too much processing and with no downsampling which allows them to have faster frame rates and to do away with the image degradation of line skipping. Sony is following in their footsteps but for the first time introducing this strategy in a consumer camera. A camera that is affordable to many who want to stick a toe into 4K video with a relatively good assurance of high quality.

One of the benefits of the bigger pixel wells is something more important than high ISO performance, it's a much wider dynamic range. Rumor has it that this sensor will compete with some of Sony's professional cameras when it comes to dynamic range meaning that the camera will have up to 13.5 stops of usable range. The gap between consumer Sony and consumer Canon just got wider....

I was amazed to find that the camera will also come with film maker profiles and the ability to use S-Log curves that also protect highlight detail. In essence, aside from the lower resolution, this will be a noon time, bright sun, desert, swim pool in summer champion. Sounds good so far, right? So why would I say that Sony has their good ole Colt .45 loaded and aimed once again at their own big toe?
And what does this new competitor mean to all of us who've been waiting with bated breath for the Panasonic 4K camera? Will we now drop those Panny plans and rush back to the Sony camp?

Well, let's get logical and read into the specs with reckless abandon.

First off, the big one: Technically you can't use the stock camera to shoot 4K to the memory card in the Sony A7s camera. Wait, I don't get it. This is being touted as Sony's consumer foray into DSLR 4K video but the camera won't record 4K video? Nope. Yep. The camera will record 2K video in a 4:2:2 configuration which means wonderful 1080p files but to actually record 4K you'll need an outboard digital video recorder to make that work. You can pretty much plan on adding at least a thousand dollars and a lot more complexity (and weak, flex points) in production to get 4K from the camera. Hey, be careful because you'll have some wires sticking out and you'll need to attach that new digital recorder somewhere.... So, technically, yes the camera will record 4K video, just not to the internal card or any other inexpensive modality. Yikes! That's big news. The Panasonic has 4K directly to the memory card figured out and ready to go in its GH4.

But once you get that digital video recorder you're pretty much ready to go and put the GH4 to shame, right?  Bigger sensor and all that. Right?

Well, no. Sony has chosen to further cripple their camera with their new consumer codec XAVC S which is actually a smaller frame (consumer 4K) versus the Panasonic's more professional and full frame codecs. The max camera to card output for the Sony is about 50 mps which is less than half the information being lovingly placed onto the internal memory card in the Panasonic.

Yes, the Sony will offer less depth of field than the GH4 but on most other technical video standards the equally priced Panasonic walks all over the Sony.  Both cameras require outboard units for stuff like XLR microphone inputs but where the Panasonic unit also offers SDI output the Sony unit, at this junction is microphones only.

Then we get into issues of handling...both still and video. Sony is using the same NP-50 battery that we first met in the Nex-7. It's a decent trade off of size, weight and endurance for a small, mostly still-intended camera but it's a whole different compromise for a camera that's being aggressively pushed as a nearly "pro grade" video production tool. According to Sony specs the battery will give one a blustery 90 minutes of total run time. Now, I don't know if you've been on many shoots lately but that about enough power for set up, test and few dress rehearsals and maybe one or two takes. Better take along six of the batteries for a full shooting day.

The GH4 gives up about 3.5 hours of run time for a big, fat battery. I feel compfy with two batteries and a little charger (as a safety precaution) for a day of shooting.

The interesting thing to me will be the focusing. The A7 was one of the slowest to focus mirror-less system cameras I ever used (but in full disclosure I haven't retested since they did the big firmware update) while the Panasonic GH3 is one of the fastest mirror-free systems I have ever used.

I guess in the end the proof of the pudding is in the tasting. If you need full frame DOF you might be swayed in the direction of the Sony, and for the price you'll probably get better video performance than any of the other DSLR style cameras out there in the price range (or above it). You will get a nice EVF, a good LCD, and lots of software tools that might make the camera a wonderful imaging tool.  Be advised that there's you'll loose fast frame rates on the Sony when you go to 4K....

On the other hand I think the GH4 product is much better thought out and a real "user" for people who like to work with small, efficient crews. And people who want fast fps. And more battery life.

Good points for the Sony (based on a close read of their specs): 

1. A system approach to still and video imaging in the same form factor as their high res cameras.

2. A better codec then their previously pervasive ACVHD offerings (still on the camera and still 28 mps...).

3. A great viewfinder.

4. Nice body style and low weight, good handling.

5. Lots of video software tools like S-Log curves and cinematic profiles.

6. I presume they will include the really good focus peaking they've had in previous cameras.

7. The ability to use a wide range of lenses from many lens makers

8. *****The big one will be the quality of the sensor (I think it will be fantastic) and all the accompanying benefits: Dynamic Range, Color Accuracy, High ISO/Low Noise Performance.

We've already discussed the drawbacks above. To condense, be sure to get your out board digital video recorder and a pocket full of batteries.

All in all it's good to see Sony come into the market.

FYI, for all of you who think it will take a long time for 4K to flow into the consumer market please be aware that Sony is shoving something like 24 new consumer 4K TVs into the markets this Fall and Samsung, Panasonic and Toshiba are right there with them. When prices fall after the holiday season, and they will, I think you'll see affluent consumers all over the place upgrading at not much higher a price than they paid for a 2K LED screen only a year or so ago. The adaptation will be much more rapid than the original move to flat panel HDs. And the computer market, led by Dell's $600 24 inch 4K monitor is already heating up. It's a brave new world. Thanks a lot, Aldous Huxley.


edit note 4/7/2014: While I may not be an expert in video I believe that Michael Reichmann over at Luminous Landscape would qualify. Here's a very informative discussion thread on one of his forums about the intro of the A7S and a casual comparison to the Panasonic product. Please read it before pronouncing me "dumb as a stump." : http://www.luminous-landscape.com/forum/index.php?topic=88774.0

edit note 4/7/2014 evening in Austin: Here is a very even handed comparison between the Sony and the Panasonic by Andrew Reid at EOSHD. Well worth reading: http://www.eoshd.com/content/12562/panasonic-gh4-vs-sony-a7s-compared-wins-4k-battle-paper