Manual focus with the 5D

The sun was shining today, and temperatures were in the 60s. It was glorious! I'd like to say that spring is officially here, but I'm terrified I'll jinx it all!

Anyway, when I got home from work [thanks to daylight savings time, there was a lot of sunlight left], I ran outside with the 5D and snapped a few frames. I tried manual focusing with the 85mm, and here are the results (I freaking love this shot).

This is at ISO100, f/2, manual focus:

...and here is a 100%(-ish) crop of where I focused (manually. haha. I'm so proud):

So! Putting aside the bit of CA that you can see in this close crop, I think it's not bad! I was quite proud of the results.

But the regular-size image... I think it's just lovely. I think the bokeh is great; the colors are nice. I might use it as my desktop image -- I need to update it anyway. Currently it's a snow photo! We're obviously way past that :)

Here's one more of some flowers right in front of our building. At ISO100, f/2:

The weather has put me in a fabulous mood. My birthday is coming up... it's next weekend. I hope these temperatures stick around :)

85 1.8 arrived, testing

Right before our "historic" snowfall started -- the second one of the season already -- my 85 1.8 arrived. I've never really tested a lens before, and I don't usually read many in-depth tests of lenses myself, but I wanted to try this one out. So, I tested it for sharpness and focus last night at a few apertures between 1.8 and 5.0. All of the shots were at ISO 400. I tried to focus directly on the second (middle) "A" on "SARASA." All shots were hand-held, and these are small crops of larger scenes.

f/1.8, 1/125 sec:



















f/2.0, 1/125 sec:



















f/2.5, 1/80 sec:





















f/3.5, 1/40 sec:





















f/4.0, 1/30 sec:





















As you can see, the image starts to get pretty fuzzy around f/4.0, but we're also looking at a significantly decreased shutter speed. I would like to do this same test outside, in sunshine, at ISO 100. Wonder what those results would look like. Thanks to The Great Blizzard of 2010 (not trademarked :)), it will be several days before I'm able to try a test like that.

At any rate, I'm extremely pleased with the sharpness at 1.8. The focus seems to be spot-on. I don't have a lot of experience evaluating lenses, and when I read about the problems people describe with new equipment on photography sites like dpreview.com, I get worried that I should test X, Y, and Z before being satisfied with the lens. But I consider "field use" the real test -- does it take the photos I want to take and perform as expected? Again, thanks to the arrival of The Great Blizzard, it will be a few days before I know the answers.

Meanwhile, on with testing ;)

Here's one of the first shots I took after getting the lens on my 350D. It was taken at ISO 400, f/1.8, 1/250 sec:




















And here's a small crop:






























Now, the first thing I notice in this crop (other than the noise in the image thanks to the ISO) is a bit of what I believe is called chromatic aberration (CA) -- the purple coloring on the top of the piece, and anywhere the light is shining directly on it. The conditions for this shot were a little funky, as you can see from the full image above -- the container is sitting directly under a lamp, which is basically providing the only light for the scene. I don't know if that is contributing to the amount of CA I'm seeing here, or if this is a "flaw" of the lens at f/1.8 (and maybe the higher ISO has something to do with it?).

Anyway, the good news seems to be that it's pretty sharp (at least to my eyes). I believe I focused on the horizontal cross-piece, where the two "wings" curve around to. Considering the cropping I've done here, and the limited capabilities of my 350D's 8 megapixels, the image seems to be evidence of a sharp lens -- even at f/1.8.

I'm pretty pleased with my amateur tests, but I'm more excited to get outside and use it -- as soon as this snow stops!