Pentax to Canon EF adapter question

thorir · 11-13-2011, 12:56 PM

Hello.
I'm new here, and hopefully asking what I am about to ask is not considered a major sin ; )

I need to mount a Pentax lens (an older K mount, manual focus) to a Canon camera, and need a proper adapter. Preferably one that allows auto focus confirm, and equally importantly (or more, actually), one that mounts the lens correctly and not at an angle, as cheaper adapters sometimes do.

So if any of you have recommendation for a good one, or a 'stay-away' warning for a bad one, I'd appreciate it greatly.

I am aware of the aperture lever issue.

Thanks in advance.

Thorir V

borno · 11-13-2011, 03:54 PM

Hey,
The one I got off eBay does mount the lens at an angle, but I don't know if they all do. Mine reports ex if as 50mm f2 no matter what lens is used. If you use on a full frame the aperture lever and shield must be removed, but fine on aps-c. I can't remember the seller though. Also my 1Dsii required me to solder a little extra to the adapter flange as this body has a little switch in the mount or I would not get focus confirm, but I don't think any other bodies have that switch.

Franky2step · 11-13-2011, 05:38 PM

check this out

Adapters: SLR to RF

borno · 11-13-2011, 06:35 PM

Wow $200, I paid about $30 for mine and it works fine.

thorir · 11-13-2011, 11:31 PM

Originally posted by Franky2step

check this out

Adapters:* SLR to RF

yea, i had him in mind (guess i was hoping to not having to spend $200 ; )
thanks

thorir · 11-13-2011, 11:32 PM

Originally posted by borno

Wow $200, I paid about $30 for mine and it works fine.

thanks. i see the angle is quite far off, but is it tight, does it stay where it is? (i've had adapters that were quite loose on the body)

borno · 11-14-2011, 03:50 AM

Originally posted by thorir

thanks. i see the angle is quite far off, but is it tight, does it stay where it is? (i've had adapters that were quite loose on the body)

Mine fits tight and the angle actually helps to see the f-stop scale a little better. I did have to modify this lens to fit the 1dsii and trim the tab that protrudes a little from the back of the adapter. It was a little spring latch that locks the lens in the mount and it would contact the metal in the focus screen area. No problems at all on a crop sensor body though.

I just looked on ebay and it appears the newer ones don't have the protruding tab, so I guess they changed the design on the bulk of them.

thorir · 11-14-2011, 12:39 PM

Originally posted by Franky2step

check this out

Adapters:* SLR to RF

Then, since I believe in spending more money once, instead of little money often (as is sometimes the case with the lowest priced alternatives) and ending up with better quality and possibly less money spent, I contacted Gandy. He was quick to reply "EF-S only", so I guess this option is not an option. Not really sure though if he read the part in my mail where I explained that the lens in question doesn't have an aperture lever, but ohwell.. Next mail Novoflex (couldn't find one via their website, but asking to be sure). So... guess it'll be Ebay after all...

thorir · 11-14-2011, 12:43 PM

Originally posted by borno

Mine fits tight and the angle actually helps to see the f-stop scale a little better. I did have to modify this lens to fit the 1dsii and trim the tab that protrudes a little from the back of the adapter. It was a little spring latch that locks the lens in the mount and it would contact the metal in the focus screen area. No problems at all on a crop sensor body though.

I just looked on ebay and it appears the newer ones don't have the protruding tab, so I guess they changed the design on the bulk of them.

Do you have any idea what to look for on ebay (and equally important: what to stay away from)?
Would be really helpful, as I'm quite green re. both brands (Ca/Pe)..

(in any case, I appreciate the time you've taken replying)

eddie1960 · 11-14-2011, 12:52 PM

If you look the Steven Goudy (cameraquest) adapter is only for K to apsc canon (he's pretty specific)
He's always been pricey on adapters however I've never heard anything bad about his adapters either (usually though I'm talking with people getting leica ltm to leica m when discussing his)

thorir · 11-14-2011, 01:00 PM

Originally posted by eddie1960

If you look the Steven Goudy (cameraquest) adapter is only for K to apsc canon (he's pretty specific)
He's always been pricey on adapters however I've never heard anything bad about his adapters either (usually though I'm talking with people getting leica ltm to leica m when discussing his)

yeah I know, I read the specs
I just had a wishful thought that it was due to the aperture lever most Pentax K lenses have, but the preset one I'm looking at doesn't.

I've purchased stuff from him before (Cosina) and would gladly spend my money with him again. Not this time though, obviously, since the thing won't fit : (

Franky2step · 11-14-2011, 05:13 PM

did a little reading in c't Digital Photography mag, article about manual lenses. It states that Pentax K to Canon EOS can use either the camera quest adapter(EF_s only), or "Enjoyyourcamera adapter but alas, it too is EF-s only.

borno · 11-14-2011, 07:34 PM - **1 Like**

Originally posted by thorir

Do you have any idea what to look for on ebay (and equally important: what to stay away from)?
Would be really helpful, as I'm quite green re. both brands (Ca/Pe)..

(in any case, I appreciate the time you've taken replying)

Hey thorir,
I wish I could remember the seller I got mine from, but most of them look pretty similar. I am pretty sure it was $25 or $30 dollars if that helps. I really wanted to use my pentax 50mm f1.4 I had since 1984 on a full frame so I had to modify it. I don't use it a whole lot though because my eyes aren't too good for MF any more. Anyways it helps me to not miss the FA31mm I sold a while back.

thorir · 11-14-2011, 11:07 PM

Originally posted by borno

Hey thorir,
I wish I could remember the seller I got mine from, but most of them look pretty similar. I am pretty sure it was $25 or $30 dollars if that helps. I really wanted to use my pentax 50mm f1.4 I had since 1984 on a full frame so I had to modify it. I don't use it a whole lot though because my eyes aren't too good for MF any more. Anyways it helps me to not miss the FA31mm I sold a while back.

: )
Ok, but thanks a lot for your input. I appreciate it.
Thorir

11-13-2011, 12:56 PM	#1
thorir New Member Join Date: Nov 2011 Posts: 10	Pentax to Canon EF adapter question Hello. I'm new here, and hopefully asking what I am about to ask is not considered a major sin ; ) I need to mount a Pentax lens (an older K mount, manual focus) to a Canon camera, and need a proper adapter. Preferably one that allows auto focus confirm, and equally importantly (or more, actually), one that mounts the lens correctly and not at an angle, as cheaper adapters sometimes do. So if any of you have recommendation for a good one, or a 'stay-away' warning for a bad one, I'd appreciate it greatly. I am aware of the aperture lever issue. Thanks in advance. Thorir V

11-14-2011, 03:50 AM	#7
borno Veteran Member Join Date: Nov 2006 Location: md-usa Photos: Gallery \| Albums Posts: 2,580	Originally posted by thorir thanks. i see the angle is quite far off, but is it tight, does it stay where it is? (i've had adapters that were quite loose on the body) Mine fits tight and the angle actually helps to see the f-stop scale a little better. I did have to modify this lens to fit the 1dsii and trim the tab that protrudes a little from the back of the adapter. It was a little spring latch that locks the lens in the mount and it would contact the metal in the focus screen area. No problems at all on a crop sensor body though. I just looked on ebay and it appears the newer ones don't have the protruding tab, so I guess they changed the design on the bulk of them. Last edited by borno; 11-14-2011 at 04:01 AM.

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11-13-2011, 03:54 PM	#2
borno Veteran Member Join Date: Nov 2006 Location: md-usa Photos: Gallery \| Albums Posts: 2,580	Hey, The one I got off eBay does mount the lens at an angle, but I don't know if they all do. Mine reports ex if as 50mm f2 no matter what lens is used. If you use on a full frame the aperture lever and shield must be removed, but fine on aps-c. I can't remember the seller though. Also my 1Dsii required me to solder a little extra to the adapter flange as this body has a little switch in the mount or I would not get focus confirm, but I don't think any other bodies have that switch.

11-13-2011, 05:38 PM	#3
Franky2step Veteran Member Join Date: Aug 2011 Location: Niagara Photos: Gallery \| Albums Posts: 792	check this out Adapters: SLR to RF

11-13-2011, 06:35 PM	#4
borno Veteran Member Join Date: Nov 2006 Location: md-usa Photos: Gallery \| Albums Posts: 2,580	Wow $200, I paid about $30 for mine and it works fine.

11-13-2011, 11:31 PM	#5
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by Franky2step check this out Adapters:* SLR to RF yea, i had him in mind (guess i was hoping to not having to spend $200 ; ) thanks

11-13-2011, 11:32 PM	#6
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by borno Wow $200, I paid about $30 for mine and it works fine. thanks. i see the angle is quite far off, but is it tight, does it stay where it is? (i've had adapters that were quite loose on the body)

11-14-2011, 12:39 PM	#8
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by Franky2step check this out Adapters:* SLR to RF Then, since I believe in spending more money once, instead of little money often (as is sometimes the case with the lowest priced alternatives) and ending up with better quality and possibly less money spent, I contacted Gandy. He was quick to reply "EF-S only", so I guess this option is not an option. Not really sure though if he read the part in my mail where I explained that the lens in question doesn't have an aperture lever, but ohwell.. Next mail Novoflex (couldn't find one via their website, but asking to be sure). So... guess it'll be Ebay after all...

11-14-2011, 12:43 PM	#9
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by borno Mine fits tight and the angle actually helps to see the f-stop scale a little better. I did have to modify this lens to fit the 1dsii and trim the tab that protrudes a little from the back of the adapter. It was a little spring latch that locks the lens in the mount and it would contact the metal in the focus screen area. No problems at all on a crop sensor body though. I just looked on ebay and it appears the newer ones don't have the protruding tab, so I guess they changed the design on the bulk of them. Do you have any idea what to look for on ebay (and equally important: what to stay away from)? Would be really helpful, as I'm quite green re. both brands (Ca/Pe).. (in any case, I appreciate the time you've taken replying)

11-14-2011, 12:52 PM	#10
eddie1960 Pentaxian Join Date: Aug 2010 Location: Toronto Photos: Gallery \| Albums Posts: 12,345	If you look the Steven Goudy (cameraquest) adapter is only for K to apsc canon (he's pretty specific) He's always been pricey on adapters however I've never heard anything bad about his adapters either (usually though I'm talking with people getting leica ltm to leica m when discussing his)

11-14-2011, 01:00 PM	#11
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by eddie1960 If you look the Steven Goudy (cameraquest) adapter is only for K to apsc canon (he's pretty specific) He's always been pricey on adapters however I've never heard anything bad about his adapters either (usually though I'm talking with people getting leica ltm to leica m when discussing his) yeah I know, I read the specs I just had a wishful thought that it was due to the aperture lever most Pentax K lenses have, but the preset one I'm looking at doesn't. I've purchased stuff from him before (Cosina) and would gladly spend my money with him again. Not this time though, obviously, since the thing won't fit : (

11-14-2011, 05:13 PM	#12
Franky2step Veteran Member Join Date: Aug 2011 Location: Niagara Photos: Gallery \| Albums Posts: 792	did a little reading in c't Digital Photography mag, article about manual lenses. It states that Pentax K to Canon EOS can use either the camera quest adapter(EF_s only), or "Enjoyyourcamera adapter but alas, it too is EF-s only.

11-14-2011, 07:34 PM - 1 Like	#13
borno Veteran Member Join Date: Nov 2006 Location: md-usa Photos: Gallery \| Albums Posts: 2,580	Originally posted by thorir Do you have any idea what to look for on ebay (and equally important: what to stay away from)? Would be really helpful, as I'm quite green re. both brands (Ca/Pe).. (in any case, I appreciate the time you've taken replying) Hey thorir, I wish I could remember the seller I got mine from, but most of them look pretty similar. I am pretty sure it was $25 or $30 dollars if that helps. I really wanted to use my pentax 50mm f1.4 I had since 1984 on a full frame so I had to modify it. I don't use it a whole lot though because my eyes aren't too good for MF any more. Anyways it helps me to not miss the FA31mm I sold a while back.

11-14-2011, 11:07 PM	#14
thorir New Member Join Date: Nov 2011 Posts: 10 Original Poster	Originally posted by borno Hey thorir, I wish I could remember the seller I got mine from, but most of them look pretty similar. I am pretty sure it was $25 or $30 dollars if that helps. I really wanted to use my pentax 50mm f1.4 I had since 1984 on a full frame so I had to modify it. I don't use it a whole lot though because my eyes aren't too good for MF any more. Anyways it helps me to not miss the FA31mm I sold a while back. : ) Ok, but thanks a lot for your input. I appreciate it. Thorir