canon lenses on pentax?

18whlr · 02-15-2011, 02:25 AM

hey guys i received 1 sigma lens 70-300 mm 4-5.6 for canon by an aunt cause she was gonna throw it away and she thought i could use it and in all honesty im thinking about it and i was wondering if there is a mount available for a canon lens

pingflood · 02-15-2011, 02:49 PM

Nope. Some lenses could theoretically be modified to fit but it would require some serious effort and money.

twitch · 02-15-2011, 02:50 PM

No can do

Aegon · 02-15-2011, 03:06 PM

Isn't that a $70 lens? (I really could be wrong).

You can buy a Sigma 70-300mm for Pentax for about $70, and sell the Canon copy for $70 too. Maybe.

**germar** · 02-15-2011, 07:20 PM

For the record, you can mount a Pentax screwmount lens on a Canon FD mount camera, like the A-1 or AE-1 from the 1980s, as I've done it. There is an adapter available that mounts to the lens and allows it to seat on the Canon mount, got it from BH or Adorama, I forget who. Totally manual, of course, and the A-1 electronics really had no idea what to make of the foreign lens .... it just blinked and flashed a great deal.

I understand the same can be done with later Canon bodies, provided you have the correct adapter. But you can't go Canon lens to Pentax body, as mentioned above. Darn shame, I have a really nice 85mm FD lens I would have loved to put on my Pentax digital bodies.

germar

séamuis · 02-15-2011, 09:10 PM

you didnt specify wether its an FD or EF (EOS) mount canon, but either way its a no-go with the use of adapters because the registration distance of canon lenses are too short for the pentax Kmount.

18whlr · 02-16-2011, 07:44 AM

Originally posted by séamuis

you didnt specify wether its an FD or EF (EOS) mount canon, but either way its a no-go with the use of adapters because the registration distance of canon lenses are too short for the pentax Kmount.

ye sorry bout that!its an EF(EOS) and i found someone to sell it and save some money for another proper pentax lens! Thanks to all for the replies!

epqwerty · 02-16-2011, 09:46 AM

It would be costly to modify compared to buying an original version made for Pentax. You can ebay and adapter for it. However, since the register distance is shorter on the Canon. You need to add glass to correct this. Therefore IQ will be worse. In addition, you lose auto focus, and the camera can not control the aperture. Therefore in the end you get a manual lens that has degraded image quality.

02-15-2011, 02:25 AM	#1
18whlr New Member Join Date: Feb 2011 Location: LARNACA Posts: 2	canon lenses on pentax? hey guys i received 1 sigma lens 70-300 mm 4-5.6 for canon by an aunt cause she was gonna throw it away and she thought i could use it and in all honesty im thinking about it and i was wondering if there is a mount available for a canon lens

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02-15-2011, 02:49 PM	#2
pingflood Veteran Member Join Date: Jun 2008 Location: Borås, Sweden Photos: Gallery Posts: 3,169	Nope. Some lenses could theoretically be modified to fit but it would require some serious effort and money.

02-15-2011, 02:50 PM	#3
twitch Veteran Member Join Date: Nov 2009 Posts: 4,571	No can do

02-15-2011, 03:06 PM	#4
Aegon Site Supporter Join Date: Jan 2008 Location: Portland, OR Posts: 1,416	Isn't that a $70 lens? (I really could be wrong). You can buy a Sigma 70-300mm for Pentax for about $70, and sell the Canon copy for $70 too. Maybe.

02-15-2011, 07:20 PM	#5
germar Site Supporter Join Date: Apr 2007 Location: North Palm Beach, Florida Photos: Gallery Posts: 728	For the record, you can mount a Pentax screwmount lens on a Canon FD mount camera, like the A-1 or AE-1 from the 1980s, as I've done it. There is an adapter available that mounts to the lens and allows it to seat on the Canon mount, got it from BH or Adorama, I forget who. Totally manual, of course, and the A-1 electronics really had no idea what to make of the foreign lens .... it just blinked and flashed a great deal. I understand the same can be done with later Canon bodies, provided you have the correct adapter. But you can't go Canon lens to Pentax body, as mentioned above. Darn shame, I have a really nice 85mm FD lens I would have loved to put on my Pentax digital bodies. germar

02-15-2011, 09:10 PM	#6
séamuis Banned Join Date: Oct 2007 Location: Savannah, U.S./Baguio City, P.H. Posts: 5,979	you didnt specify wether its an FD or EF (EOS) mount canon, but either way its a no-go with the use of adapters because the registration distance of canon lenses are too short for the pentax Kmount.

02-16-2011, 07:44 AM	#7
18whlr New Member Join Date: Feb 2011 Location: LARNACA Posts: 2 Original Poster	Originally posted by séamuis you didnt specify wether its an FD or EF (EOS) mount canon, but either way its a no-go with the use of adapters because the registration distance of canon lenses are too short for the pentax Kmount. ye sorry bout that!its an EF(EOS) and i found someone to sell it and save some money for another proper pentax lens! Thanks to all for the replies!

02-16-2011, 09:46 AM	#8
epqwerty Veteran Member Join Date: Dec 2009 Location: Ontario Posts: 550	It would be costly to modify compared to buying an original version made for Pentax. You can ebay and adapter for it. However, since the register distance is shorter on the Canon. You need to add glass to correct this. Therefore IQ will be worse. In addition, you lose auto focus, and the camera can not control the aperture. Therefore in the end you get a manual lens that has degraded image quality.