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Forum: Pentax SLR Lens Discussion
03-17-2009, 02:01 PM
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Thanks for the additional info.
My adaptor ring arrived today. With the lens at infinity the rear protrusion goes beyond the bayonet by about 1mm. The proper Canon lenses (or at least the ones I have) do not do this.
I lifted the mirror with my fingernail and it didn't go that close to the lens so I concluded I would be ok.
I tried it and there is no problem. I can't wait to take it out in the daytime to try it properly. I did a couple of tests and it appears to focus slightly beyond infinity, so that's ok.
I have just seen a 100% identical lens finish on ebay for £57 so it seems these are popular little lenses. The ebay one looked in a poor physical state too.
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Forum: Pentax SLR Lens Discussion
03-16-2009, 10:30 AM
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You have some nice photos there hinman. Your lens looks very similar but your aperture ring looks different to mine plus yours looks in better condition. Mine is a little scratched but the optics have always been protected.
On mine I have to pull the ring towards the camera and then turn it to choose the aperture. I find this less than useful for my purposes. I may take the lens apart again and see if I can modify it so that it's a continuous movement.
I have seen these lenses with a red T on them. What does this mean?
Sorry for my ignorance :)
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Forum: Pentax SLR Lens Discussion
03-16-2009, 01:56 AM
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Thank you both for your help.
The focus ring on this lens is quite tight too, but I think it has always been like that. It's not been in regular use for at least 25 years.
If it's the preset type then I may run into problems with it hitting the mirror.
I've had great results with it as a macro lens with my current (non infinity) adaptor, which is why I was keen to see it working through its full range.
The main reason I want to try this lens is for video. The 5D MK II can do full 1080P HD but there is no aperture control using canon lenses (It's always in auto mode). With this lens I will be able to choose what I want.
Most of the photos of me as a baby and child were taken with this lens.
I will certainly post some results here when I get some.
Thanks again
Paul
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Forum: Pentax SLR Lens Discussion
03-15-2009, 03:19 PM
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Hi, I came across this site through google. It seems that people here really know their stuff so I thought I'd ask this question here.
I have this lens that I would like to use on my Canon EOS 5D MKII, but I would like to know the exact type.
I have found very similar looking lenses on the internet but none that look just line mine.
It's been in the family since the late 60's. It came with a Pentacon camera that my dad bought.
I have been using it for macro only, as the adaptor I have doesn't allow focussing to infinity. I am hoping to get a better adaptor that will, but I need to know exactly what type this is because from what I've read, certain types can catch the mirror.
Is this a "preset" or "semi-automatic" and what is the difference? Also wat is that number on the front? Is it a model number or a serial number?
Here are a few pictures of the lens. As you will notice it has no release pin on the back. It has been modified so that it no longer locks fully open.
Thanks.
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