Struwwelpeter Posted September 15, 2004 Share Posted September 15, 2004 Hello, I was wondering if adapters are available for using C-mount zooms on a camera which has an M42 pentax screw mount (Krasnogorsk)? I've looked around the net quite a bit and rang SRB in England with no such luck. Is this because it's just not possible, or? If they are available, would I encounter any problems such as vignetting on the wider angles with a 12-120mm C-mount lens on a K-3? Thanks for your time, Peter. Link to comment Share on other sites More sharing options...
Patrick Neary Posted September 15, 2004 Share Posted September 15, 2004 Hi- It may be more of an issue with the flange focal distance- a c-mount lens sits very close to the film plane while a pentax mount lens is much further away. An adaptor would probably look like an inverted cone that would sink into the camera body to get the c-mount lens close enough to the film plane, and may crash into the camera's shutter. The opposite adaptor, which lets you mount pentax screw mt. onto a c-mount body sticks out about 2" from the camera's c-mount. If you do happen to find one, report back! Link to comment Share on other sites More sharing options...
Struwwelpeter Posted September 15, 2004 Author Share Posted September 15, 2004 Hi, thanks for the reply. I'm going to give Les Bosher in the UK a call tomorrow and see what he thinks on the matter. You are probably right though, it may not be possible to "fit it all together". I'll let you know what I find out regardless. Cheers, Peter. Link to comment Share on other sites More sharing options...
Struwwelpeter Posted September 16, 2004 Author Share Posted September 16, 2004 Okay, i gave Les a call a few hours ago and aside from being a really pleasant chatty guy, he knows his stuff and was quite happy to talk me through everything like the amateur I am :P Simply put, No. It's not possible to make an adapter to use C-mount lenses on an M42 body for the reasons you describe Patrick. He is however able to convert a C-mount lens to M42 for about £150. Depending on whether you are planning on selling the lens in the future or upgrading cameras to a C-mount, this may or may not be a wise decision. I believe you can get adapters for using M42 lenses on C-mount cameras so this may not be as a big an issue as it sounds. If i decide to give it a go, I'll be sure to let you know what happens! Take Care, Peter Link to comment Share on other sites More sharing options...
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