I would like to buy cheap 50mm lens for canon ef mount to use with my ZWO Asi 294MC Pro. I would love to buy famous Nifty-fifty, especially because I can buy used one even for 80 dollars, but as I understand it can not be used without electronics to change focus at all and to set the aperature. Is there any version of it which can be used fully manually?
What are your other options?
I would like a cheap lens - best below 140 dollars (can be price for used ones).
Nifty 50's have a terrible manual focus. It is more of an autofocus lens, the MF is real sloppy and has no grease resistance. I have seen some decent nifty 50 images. You can expect with any cheap lens to have to stop down.
Personally IMO if you are going to stop down to F4, there are a large range of lenses that will put up a useable image. I own 2 of these Pentax 50mm F1.7's They are crazy cheap and perform pretty well at F4 on APS-C. It has a manual aperture and the focus ring is very smooth. You need a Pentax k to EF adapter. Get a good adapter that allows infinity focus. You also should buy a 49mm to 76mm step up ring and get an aluminum 76mm hood which allows you to use a dew heater without messing up the focus.. This might be another $15 on ebay.
Here are some images taken on APS-C with the pentax
Barnard's E B142-143 Dark Nebula "process ver. 2" by Wes, on Flickr
Andromeda with Triangulum and the Intrastellar IFN by Wes, on Flickr
Orion Complex Fall 2016 by Wes, on Flickr