Originally posted by bikehead90 A month or so ago, I got a Starblitz mirror/reflex lens from an estate sale. Always wanting to play around with one I snapped at the chance. Personally, I think the donut bokeh is kind of cool and fun, but damn is this lens soft. I understand not all lenses have to be tac sharp, but I’m really having a hard time figuring out “what to do with this thing”. I put it on my K3 and shot the moon, but was extremely unhappy with the quality. Any suggestions of where/what kind of photography I can do, outside if extremely fuzzy shots of the moon?
The problem with catadioptric lenses, aside from the funky out-of-focus highlights, is that many of them simply aren't very good. There are a few decent models from the likes of Tamron and Sigma, and a few good Soviet models, but the majority of lower-cost mirror lenses aren't great. That aside, they all benefit from tripod mounting (or fast shutter speeds) and accurate focusing (achieved using magnified Live View - focus peaking simply isn't sufficient). You'll probably find distant subjects will suffer some detail loss, so try shooting things that are closer to you... a few tens or hundreds of feet, rather than miles.
If you have a reasonable-sized garden, fixed position photography of birds and animals on feeders is one thing you might consider. You can set up your camera and lens on a sturdy tripod, then use magnified Live View to accurately focus on the feeder. You might take a few test shots of it so you can confirm and adjust focus as necessary. Then, wait for the critters to appear and shoot away.
Aircraft photography might be another application. Set yourself up at or near a local airport so you have a pre-focused view of a certain section of airstrip, then wait for aircraft to reach that point before triggering the shutter. Same idea for motorsports.
In all cases, keep the shutter speed high - at least 1 / focal length - and take multiple exposures to give yourself a better chance of keepers. Shoot raw. Images won't look tack sharp when pixel peeping, so expect to do some post-processing to increase local contrast and/or sharpness.
This was taken with my Soviet 3M-5CA (hand-held, but I was using a mirrorless camera with an EVF, so focusing was relatively easy):