Are they any good? I'm on a tight budget but i'm looking to buy a few new lenses for my Sony Alpha. There seems to be alot of cheap older MF M42 lenses kicking about on Ebay. I just wondered if anyone had any experience with them. I understand that when useing them you can only use Aperture Priority which isn't a problem as thats what i use 90% of the time anyway. Some of the Lens adapters say they have a AF confirm chip? Not sure what this is or whether i need it. The ones without AF confirm chips are about 1/3 the price.
Any advice much appreciated.
I've been recently hit by Manual Focus Disease, so now I have a number of M42 lenses (I prefer not to tell how many :blushing: ).
You go with aperture priority, with stop-down (focus wide open, then close to the aperture you want), and of course manual focus. AF confirm is useful because, unless you have a pro dSLR, viewfinder is too small and dark to really help in precise focus. AF confirm chip simply tells the camera there is a lens, so AF verification is activated, and you hear a beep or see a led when in focus, like in autofocus (but manually moving lens). I should tell not always AF confirmation is precise (when I can I focus in live view).
At the end, you will shoot like in old times, slower than usual because you set everything manually.
Optical quality of old prime lenses (fixed) is typically not bad if compared to kit zooms, and sometimes very good (but as there is some hype around old lenses, for the best ones you spend as for a new lens). However, there could be some difference in behaviour that a usual modern zoom shooter may consider a defect, while a collector considers as "soul" of the lens (e.g. good definition but less contrast, recoverable in PP). Some lenses are also "easy" to build so are easy to be built well (50mm, 135mm).
And again, if you are normally using a kit zoom, almost any fixed lens will be faster and with better bokeh - something that might give some satisfaction to counter lost time in manual focusing.
Here you find samples, wide open, from Zeiss Pancolar 2/50 and Zeis Sonnar 3.5/135 (not at all the worst around...

):
http://www.thephotoforum.com/forum/...-forum-photo-gallery/222826-vineyards-cc.html
On the other side, MF zooms are less appreciated - modern ones are better. Anyway, they are so cheap to you could give a try.