Originally posted by pepperberry farm here it is - your monthly mid-month check-in....
how is that lens working out for you - did you choose poorly this time around?
or is this the month you discovered just what you've been missing?
The A 645 75/2.8 is a ripper of a lens. 240 grams of sharp to the edges goodness, I haven't seen the remotest hint of anything unpleasant from this lens at all. And if we're looking for excitement, I absolutely
relish the natural output that I feel that I'm getting, no need to touch the 'sharpening' - ever. No need to push and pull and massage the files. (Note: On the adaptor, the lens is twice the length and twice the weight, so no longer small at all.)
To hit what I feel is the essence of the point more directly on - If we compare this lens to the K mount lenses on the same sensor, (ie looking at an image enlarged from an equal sensor area) then this 75 is about equal to the better K mount lenses, I don't feel that it would be a standout on aps-c at all. However putting it on a larger sensor really takes the pressure off lens performance in my experience. Not only is the enlargement ratio from sensor size to final image just half of what it would be from aps-c, also the required aperture for an equivalent depth of field is a whole 2 stops narrower, which even further takes the pressure off the lens. (There are notable downsides to this as well, sometimes
slooooow shutter speeds and/or high ISO's.) So if I'm shooting my 75 at f/2.8, to be equivalent on aps-c you'd need to be shooting a 35mm at f/1.4 - It's just a whole lot easier to make a lens do 75/2.8 nicely than 35/1.4.
The last thing I'm intending to do by saying this is to brag about how
big mine is (my er....
sensor) Just saying it how I see it over and over, old lenses do far better on bigger sensors. There are exceptions of course, ones with mushy edges, but the general trend is undeniable.
So how's my lens? My lens is just fine thanks. But it is my lens/camera combination that really lets the lens shine.
Note for those that haven't read enough already, Lol: You might notice my conversions are a bit creative - how does 75mm on 33 x 44 equal 35mm on aps-c? I know, I know... I've gone around and around this so many times in my notebook. My only answer is that it is not the exact science that the maths would imply. When the native aspect ratio changes from 3:2 to 4:3 things just feel a bit longer or shorter or somehow just
different. I played with doing the conversion on long side, on short side, on diagonal and on area, and none of them feel exactly equivalent. Now I just accept that it's a slightly mushy conversion.
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A lot of what I enjoy about this Single Challenge is the restriction to a single focal length, rather than details about the lens' performance as such. In this respect, 60mm equiv is very comfortable for me. I think in the previous challenges I've done, I've felt a bit of focal length frustration - you know, not being able to frame up a shot for want of something longer or shorter. I'm not feeling that this month.
One challenge for myself for the future will be to do a SIC with something wide -
Not my comfort zone at all! I'll do it, I just haven't decided yet whether I should work my way down the focal lengths, or just smash in with a wide and fumble and blunder my way through.
My other pending mission is to drill down a favourite
pair of focal lengths. I don't really like carrying three lenses, two is much nicer. Of course this doesn't fit with the SIC theme, however what I learn here definitely plays into the thought process. In my months off from SIC I'm often working on the two lens thing.
---------- Post added 05-16-22 at 01:48 AM ----------
Originally posted by iheiramo Also start of the windsurfing season has taken a lot of my energy. I'm been too lazy during the winter and I need to build up some stamina. I've been trying to keep sessions short and go often, 7 days out of last 10, but it takes few weeks more to get into proper shape. I'm glad I took sunday shot in the morning as the wind very gusty and unreliable, so had to use strength to steady the sail and I was really beaten after surf. Trying to recover from yesterday today, but feel beaten still. Somedays it's just hard to find the energy for shooting
I can understand that one! I have a long history with windsurfing, most recently on a Lechner D2, which is such a different experience to a flat bottomed board. Here's a video from a few years ago if you're interested: