Thoughts on my Soligor 1:2.8/35mm (M42 and all-manual):
tl;dr - cheap as chips; feels solid; indistinct aperture ring clicks; weird ninja-star or almost-swirly-but-spiky bokeh; super-long focus ring throw; good image quality in middle apertures; soft as a down coverlet wide-open; maHOOOOsive flare shooting into the sun (and my copy has fungusy weirdness in that flare). Definitely a good buy for the price.
This was bought for the princely sum of $26 AUD on eBay.
I'm just not quite sure about the focal length. It doesn't seem to make me as happy as did either my 28mm Takette, or my 50mm Pentax M. Then again, I don't know if it really is the focal length that niggles. Not sure...
The focus throw is loooooooooooooooooooooong. With the Takette's being so amazingly short, and me getting so quickly so comfortable with that, it's been rather odd this month.
Funkadelicalicious bokeh at times. Sometimes really busy and migrainous, sometimes close to normal, and sometimes just utterly bonkers but in a kind of cool way. I dunno if it's the ninja star curved diaphragm blades or what, but it's certainly not boring.
I got to thinking it's pretty soft - to the point of mushy - wide-open at f/2.8. Stop down to 4 or 5.6 and it's been well-good enough for me. I did a quick-and-dirty test using a bit of text on a sheet on my office wall. F/2.8 was appallingment; f/4 was fine; f/5.6 and 8 were the best; f/11 wasn't much behind; f/16 was starting to go off a bit - but my impression of that was also affected by the noise in the photo at the smaller apertures.
Hyperfocal messing-about has been a little confusticating. I tested on a couple of days, and found that it didn't seem to matter whether I was at f/5.6, 8, 11, or 16; focusing to 30 feet seemed the thing to do. It shouldn't oughta work like that, as far as I understand these things (which admittedly, is not that much).
The aperture ring is a little odd by comparison with my other manual lenses (though it's much better than the Sigma, which doesn't have one at all
): it has half-stops all the way from 2.8 to 16 (the narrowest it goes), which is nice, but all the clicks are really soft and hard to notice in the heat of battle. Thus it's not easy to just twist the ring a certain number of clicks and know where you are. That has led to slow-downs, as I've had to stop and check visually before shooting.
I *must not* shoot into the sun. Flare is ... interesting ... Not just for the ginormous ninja-stars, but for what I figure is fungus on the rear element, magnified about a gazillion times in the mahoosive flared ninja-star, vis:
My favourite shot for the month would be a little hard to choose (not because they're all so good, but because really my month's worth of photos doesn't look particularly inspiring to me), but the fact that I've wanted for donkey's years to photograph lightning, and early this month I finally succeeded, says this is probably it:
The other nice thing about that photograph is that what purports to be the official Flickr account on Flickr favourited it, and added it to a "lightning" gallery. So that was cool.