Old Pentax Lenses on Canon 450D

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DaveKing

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Dave
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My Dad has dug out of the loft his old camera equipment. In there there are three old Pentax lenses:
50mm F1.7
85-210mm (not sure of the F-stop)
28mm F2.8

All of the lenses appear to be in good condition and each have a set of filters for them. I would like to try and use them on my 450D. What converter should I use for it?
 
Thanks Yin, how can I tell if they are M42 or K-mount. There appears to be quite a range there! Is it worth paying extra for the focus confirm? Also are the plastic mounts OK, or should I pay extra for the metal mount?

Sorry for all the questions!
 
both the wiki links for pentax-k/m42 in my posting show the reverse view of the lens - if it's a bayonet type fastening, it should be a P-K mount. If it's a screw thread, then it's likely to be a m42.

The focus confirm is helpful, but it's not worth much more than a tenner premium (as you can buy the chips separately for a fiver or so...)
 
They are definitely K-mount lenses. Cheers!

I'm looking forward to getting my hands on the f1.7 and I am sure I will be scanning ebay for some more lenses
 
Just be aware that manual focussing on a crop sensor DSLR is nowhere near as easy as it is on a film camera; with its large, bright grainy viewfinder with actual focussing aids. Expect a lot of missed shots due to focus error..
 
trencheel303 said:
Just be aware that manual focussing on a crop sensor DSLR is nowhere near as easy as it is on a film camera; with its large, bright grainy viewfinder with actual focussing aids. Expect a lot of missed shots due to focus error..
Click to expand...

Well I don't think it's a huge risk given the £10.00 or so cost of an adapter. I started with a Sony a200 and a ton of MF lenses, and never had any difficulty. The only potentially dodgy area is apertures faster than f2.8 where the viewfinder doesn't show the true depth of field.
 
trencheel303 said:
Just be aware that manual focussing on a crop sensor DSLR is nowhere near as easy as it is on a film camera; with its large, bright grainy viewfinder with actual focussing aids. Expect a lot of missed shots due to focus error..
Click to expand...

You can purchase special focussing screens for better manual focussing. Probably worth doing if you're going to spend a lot of time using them.
 
Just discovered my dad also has an SMC Pentax asahi 50mm f/1.7 K left over from his old pentax SLR. Might have to borrow that :D.

Might also try reversing it onto extension tubes for macro. mm.
 
Can I check with you Dave, have you had to remove the little leaver on the back of the 50mm for it to fit onto your 450D?
 
squishy said:
Can I check with you Dave, have you had to remove the little leaver on the back of the 50mm for it to fit onto your 450D?
Click to expand...

Hi sorry for the slow reply - I have been busy with too much drink and booze! :lol:

Not sure about the lens as I haven't had a try to fit it yet, but as soon as I know I will let you know. I am trying to order one before new year so I will let you know as soon as I do
 
BE CAREFUL!!!! Using manual focus lenses on DSLR's can be addictive!!!:D It's great fun and takes photography to another dimension!
 
Yes, I think it might be :)

squishy - I have fitted the adapter and lens and fired a few test shots and all is OK. No further mods requried. Going to go out at lunch and find something to shoot today...
 
Well a bit of an update, the 50mm F1.7 certainly seems like a good lens! Not shot anything too fun yet but it seems to get good results. I need to work on my focusing technique, but it is really sharp when you get it dead on.

The 28mm f2.8 and the 85-210mm f4.5 have stuck aperture rings unfortunately :( But for getting a 50mm for £12 seems like a bargain. Once I get bored with the 50mm I am definitely going to look for a 135mm
 
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