Go Back   Steve's Digicams Forums > Digital SLR and Interchangeable Lens Cameras > Pentax Lenses

Reply
 
Thread Tools Search this Thread
Old May 24, 2009, 9:15 PM   #1
Super Moderator
 
Mark1616's Avatar
 
Join Date: Oct 2005
Posts: 7,452
Default Putting Pentax Lenses on a Canon 500D

Hi lovely Pentaxians

I've just added a Canon 500D to my kit as I wanted to be able to shoot video with my Canon kit and was aware of the limitations of both the Canon 500D and 5D mkII not being able to control aperture.

I know that there are certain adaptors available to Pentax and Nikon that I believe will allow me to set the aperture manually.

I'm considering getting this adaptor http://cgi.ebay.co.uk/Pentax-PK-Lens...3A1%7C294%3A24 from your knowledge of Pentax lenses do you think what I'm trying to do will work?

At then end of the day we are not talking much money so I'm happy to give it a bash and you never know you might well find me digging around for lens suggestions.

Thanks a lot for any advice.

Mark
Mark1616 is offline   Reply With Quote
Sponsored Links
Old May 24, 2009, 10:25 PM   #2
Senior Member
 
Join Date: Jun 2004
Posts: 477
Default

I might just say that you should be careful that the protection post for the aperture follower on the Pentax K compatible lens doesn't foul something in the Canon 500D.

I damaged an E-510 with a Pentax K mount lens. Check everything before mounting the lens/adapter to the camera.
dnas is offline   Reply With Quote
Old May 25, 2009, 6:51 PM   #3
Senior Member
 
mtngal's Avatar
 
Join Date: Nov 2005
Location: Frazier Park, CA
Posts: 16,056
Default

Interesting idea. I've never messed with adaptors, so can't really offer much. I'm not surprised about dnas having a problem with the post that allows the camera to stop down the lens. One thing that comes to mind immediately is that you'd need to use a lens that has an aperture ring - not one of the DA or FAJ lenses.

I have a K-mount TC (used on an ME so it's manual, no electronic contacts) and use it as an extension tube. My FA and A lenses don't seem to mind being mounted and used on it so you wouldn't have trouble with with the lenses themselves for M, A, F or FA lenses.

Since you won't be using the camera to stop down the lens, the main problem I can see is being able to focus through a significantly stopped down lens.

Would this be easier if you were to use an M42 screw mount lens?
mtngal is offline   Reply With Quote
Old May 25, 2009, 7:05 PM   #4
Senior Member
 
Join Date: Jun 2004
Posts: 477
Default

You focus while it is wide open, then stop down.

Regarding the fouling of part on he lens, it's the post that protects the aperture lever, not the lever itself that damaged the E-510. However, it's best to check BOTH with the Canon. The protector post is generlly easy enough to remove, and it doesn't affect the lens function at all.
dnas is offline   Reply With Quote
Old May 25, 2009, 7:34 PM   #5
Senior Member
 
robar's Avatar
 
Join Date: Mar 2005
Location: D/FW area Texas
Posts: 7,590
Default

correct me if i'm wrong but i thought the focus plane on canons are too close for a pentax lens.
__________________
Roy
Passion is in all great searches and is necessary to all creative endeavors. - W. Eugene Smith
http://picasaweb.google.com/roysphoto/?pli=1
robar is offline   Reply With Quote
Old May 25, 2009, 10:11 PM   #6
Senior Member
 
Join Date: Jun 2004
Posts: 477
Default

Canon EF mount is 44mm. Pentax K is 45.5mm
So you've got just 1.5mm

It's close but it's just enough. One other reason why it works, is that the EF mount has quite large diameter so the PK fits nicely inside the EF mount.

So, for example, you won't find an EF to 4/3 mount adapter because the EF's large diameter won't allow the lens to fit inside the 4/3 mount diameter. (and I'd also say it's pointless because there no aperture ring on the EF lenses, although I've seen an EF to micro 4/3 adapter!!!)
dnas is offline   Reply With Quote
Old May 27, 2009, 4:41 AM   #7
Senior Member
 
bigdawg's Avatar
 
Join Date: Feb 2005
Location: Thach Alabama
Posts: 14,981
Default

Quote:
Originally Posted by Mark1616 View Post
Hi lovely Pentaxians

I've just added a Canon 500D to my kit as I wanted to be able to shoot video with my Canon kit and was aware of the limitations of both the Canon 500D and 5D mkII not being able to control aperture.

I know that there are certain adaptors available to Pentax and Nikon that I believe will allow me to set the aperture manually.


I'm considering getting this adaptor http://cgi.ebay.co.uk/Pentax-PK-Lens...3A1%7C294%3A24 from your knowledge of Pentax lenses do you think what I'm trying to do will work?

At then end of the day we are not talking much money so I'm happy to give it a bash and you never know you might well find me digging around for lens suggestions.

Thanks a lot for any advice.

Mark
Mark...not selling anything here but if you really want to try pentax lenses on that Canon go here for very good info...http://forum.mflenses.com/

The members on that forum have hooked up almost any combination of lens and camera you could dream up. Very helpful folks and always friendly.
__________________
Big Dawg
bigdawg is offline   Reply With Quote
 
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -5. The time now is 7:29 AM.