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I have just been given one of the above by a work colleague. It is a pentax K fitting and I am wondering if the k to eos adaptors available on ebay will allow me to use this with the 40d. Also should I get the basic adaptor or AF confirm version and finally is it worth bothering in the first place.
Dave
Quote: is it worth bothering in the first place
Probably only for novelty/experimental purposes and to have a bit of fun with; I would say. I know nothing of this model but problems generally include not very good performance, fixed aperture and 'doughnut' highlights
I thought that would be the answer. I am anxious to give it a go if the adaptor will work, not least because it was kind of my colleague to dig it out and think of me. I think he only used it once as though an old lens it looks brand new.
i used to have one of those leses but made by another name (probably rebadged) due to the consant apeture (f8) images will either be dark or noisey as you will have cranked up the iso. the ae will be out too as there will be no electric circuitary telling the camera what f stop it is, so you would pretty much have to shoot in M mode, guestimating the settings. another drawback of these lenses will be lack of sharpness. its a good lens to mess about with , but not really ideal for birds/wildlife etc. i bought mine off ebay for around 60 quid, and used it a few times and put it back on ebay. fortunately i didnt lose too much when sold, hope thise info is of some use.
I have a 500mm mirror lens (Tamron) and it can be great fun.
Okay - you need a tripod (or extremely good light) because of the fixed f8 but I have had no problems with quality and the doughnut highlights .......... there is nothing wrong with them (and they look great with water)
If you only require such a long lens occationally it is going to be a godsend (especially as it is a freebee) - get the adaptor and give it a go.
This
and This were taken (handheld)
Got this one with the tamron mentioned above. Yeah, fine, it's not the sharpest, but with an extension tube, I was working at about f/11 from twelve feet away, so it's not awful 
Thanks guys I am most encouraged by those shots and I think its definitely worth a punt on the adaptor
Dave
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