What lenses can be used with K-5?

**lebjohnson** · 06-24-2011, 02:46 PM

I currently am being tempted to upgrade from my K20D to K-5. I need to know what lenses (accumulated over the past 15 years) will give me good images (given the vagarities of the photographer

). This question arises due to the "full frame" sensor on the K-5, vs the smaller sensor on the K20D. The lenses are:

SMC Pentax FA 1:3.5-5.6 28-80mm,
SMC Pentax F 1:4.7-5.6 80-200mm,
SMC Pentax FA 1:1.4 50mm,
SMC Pentax DA 1:4.5-5.6 50-200,
SMC Pentax DA 1:2.8 40mm,
SMC Pentax DA 1:3.5-5.6 18-55mm AL,
SMC Pentax DA 1:2.8(22) 14mm ED(IF),
SMC Pentax DA 1:3.5-6.3 18-250mmED AL (IF),
Tamron AF 70-300mm 1:4-5.6 LO TELE-MACRO[1:2],
SIGMA DG MACRO 1:2.8 150mm

Will I need to invest in (or beg as gifts) new lenses? Which of those that I have will do the trick? (And, no, I don't use all of them at once...

)

Thanks for your advice

dgaies · 06-24-2011, 02:48 PM

The sensor size of the K20D and K-5 are basically identical, and neither are "full frame".

All of the lenses on that list will work just fine

Blue · 06-24-2011, 02:51 PM

Originally posted by lebjohnson

I currently am being tempted to upgrade from my K20D to K-5. I need to know what lenses (accumulated over the past 15 years) will give me good images (given the vagarities of the photographer

). This question arises due to the "full frame" sensor on the K-5, vs the smaller sensor on the K20D. The lenses are:

SMC Pentax FA 1:3.5-5.6 28-80mm,
SMC Pentax F 1:4.7-5.6 80-200mm,
SMC Pentax FA 1:1.4 50mm,
SMC Pentax DA 1:4.5-5.6 50-200,
SMC Pentax DA 1:2.8 40mm,
SMC Pentax DA 1:3.5-5.6 18-55mm AL,
SMC Pentax DA 1:2.8(22) 14mm ED(IF),
SMC Pentax DA 1:3.5-6.3 18-250mmED AL (IF),
Tamron AF 70-300mm 1:4-5.6 LO TELE-MACRO[1:2],
SIGMA DG MACRO 1:2.8 150mm

Will I need to invest in (or beg as gifts) new lenses? Which of those that I have will do the trick? (And, no, I don't use all of them at once...

)

Thanks for your advice

Where did you come up with a copy of the Sigma 150mm f2.8 DG Macro? Secondly, the K-5 isn't full frame.

dgaies · 06-24-2011, 02:55 PM

Originally posted by Blue

Where did you come up with a copy of the Sigma 150mm f2.8 DG Macro? Secondly, the K-5 isn't full frame.

I assume it's a typo (transposed "0" and "5") and is actually the 105mm.

bobmaxja · 06-24-2011, 03:36 PM

Every lenses will work

Ubuntu_user · 06-24-2011, 03:44 PM

Every single one of those lenses will work with a K-5!

**jatrax** · 06-24-2011, 04:39 PM

All of those will work on the K-5. The DA lenses will NOT work on the Pentax full frame camera. But since that does not exist, except in film cameras, you are good.

joe.penn · 06-24-2011, 04:53 PM

Originally posted by lebjohnson

SMC Pentax DA 1:2.8(22) 14mm ED(IF)

I heard that one doesn't play well with the K5 (cough*, cough*), I would love to take it off of your hands for you...

---

J/K

---

SpecialK · 06-24-2011, 06:48 PM

They will all work, but the question is which for "good images".

In that regard, you are pretty safe with the 14, 40 and 50. The others might be OK, but that is up to you of course. I would unload the 18-55, 50-200, and 70-300 if you are looking to upgrade IQ.

06-24-2011, 02:46 PM	#1
lebjohnson Site Supporter Join Date: Jun 2011 Location: Delaware Photos: Gallery \| Albums Posts: 18	What lenses can be used with K-5? I currently am being tempted to upgrade from my K20D to K-5. I need to know what lenses (accumulated over the past 15 years) will give me good images (given the vagarities of the photographer). This question arises due to the "full frame" sensor on the K-5, vs the smaller sensor on the K20D. The lenses are: SMC Pentax FA 1:3.5-5.6 28-80mm, SMC Pentax F 1:4.7-5.6 80-200mm, SMC Pentax FA 1:1.4 50mm, SMC Pentax DA 1:4.5-5.6 50-200, SMC Pentax DA 1:2.8 40mm, SMC Pentax DA 1:3.5-5.6 18-55mm AL, SMC Pentax DA 1:2.8(22) 14mm ED(IF), SMC Pentax DA 1:3.5-6.3 18-250mmED AL (IF), Tamron AF 70-300mm 1:4-5.6 LO TELE-MACRO[1:2], SIGMA DG MACRO 1:2.8 150mm Will I need to invest in (or beg as gifts) new lenses? Which of those that I have will do the trick? (And, no, I don't use all of them at once...) Thanks for your advice

06-24-2011, 02:51 PM	#3
Blue Moderator Site Supporter Join Date: Jun 2008 Location: Florida Hill Country Photos: Gallery \| Albums Posts: 17,377	Originally posted by lebjohnson I currently am being tempted to upgrade from my K20D to K-5. I need to know what lenses (accumulated over the past 15 years) will give me good images (given the vagarities of the photographer). This question arises due to the "full frame" sensor on the K-5, vs the smaller sensor on the K20D. The lenses are: SMC Pentax FA 1:3.5-5.6 28-80mm, SMC Pentax F 1:4.7-5.6 80-200mm, SMC Pentax FA 1:1.4 50mm, SMC Pentax DA 1:4.5-5.6 50-200, SMC Pentax DA 1:2.8 40mm, SMC Pentax DA 1:3.5-5.6 18-55mm AL, SMC Pentax DA 1:2.8(22) 14mm ED(IF), SMC Pentax DA 1:3.5-6.3 18-250mmED AL (IF), Tamron AF 70-300mm 1:4-5.6 LO TELE-MACRO[1:2], SIGMA DG MACRO 1:2.8 150mm Will I need to invest in (or beg as gifts) new lenses? Which of those that I have will do the trick? (And, no, I don't use all of them at once...) Thanks for your advice Where did you come up with a copy of the Sigma 150mm f2.8 DG Macro? Secondly, the K-5 isn't full frame.

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06-24-2011, 02:48 PM	#2
dgaies Veteran Member Join Date: Oct 2009 Location: Maryland / Washington DC Posts: 3,917	The sensor size of the K20D and K-5 are basically identical, and neither are "full frame". All of the lenses on that list will work just fine

06-24-2011, 02:55 PM	#4
dgaies Veteran Member Join Date: Oct 2009 Location: Maryland / Washington DC Posts: 3,917	Originally posted by Blue Where did you come up with a copy of the Sigma 150mm f2.8 DG Macro? Secondly, the K-5 isn't full frame. I assume it's a typo (transposed "0" and "5") and is actually the 105mm.

06-24-2011, 03:36 PM	#5
bobmaxja Veteran Member Join Date: Mar 2010 Location: Laval, Quebec Canada Posts: 2,171	Every lenses will work

06-24-2011, 03:44 PM	#6
Ubuntu_user Veteran Member Join Date: Mar 2010 Photos: Gallery \| Albums Posts: 1,545	Every single one of those lenses will work with a K-5!

06-24-2011, 04:39 PM	#7
jatrax Site Supporter Join Date: May 2010 Location: Washington Cascades Photos: Gallery \| Albums Posts: 12,991	All of those will work on the K-5. The DA lenses will NOT work on the Pentax full frame camera. But since that does not exist, except in film cameras, you are good.

06-24-2011, 04:53 PM	#8
joe.penn Veteran Member Join Date: Mar 2011 Location: Maryland (Right Outside Washington DC) Photos: Gallery \| Albums Posts: 2,902	Originally posted by lebjohnson SMC Pentax DA 1:2.8(22) 14mm ED(IF) I heard that one doesn't play well with the K5 (cough, cough), I would love to take it off of your hands for you... --- J/K ---

06-24-2011, 06:48 PM	#9
SpecialK Pentaxian Join Date: Dec 2006 Location: So California Photos: Gallery Posts: 16,481	They will all work, but the question is which for "good images". In that regard, you are pretty safe with the 14, 40 and 50. The others might be OK, but that is up to you of course. I would unload the 18-55, 50-200, and 70-300 if you are looking to upgrade IQ.