K100D lens compatibility question

pboyle · 06-15-2018, 03:06 PM

Hi all, I'm new to this site and was just wondering if anyone can help me. I have a Pentax K100D with a 18-50mm lens. Someone is selling a Pentax camera with an extra lens a 100-300mm lens. Would this lens be compatible and any good with my camera. I'm still learning how to use my camera.

Not a Number · 06-15-2018, 03:36 PM - **1 Like**

Almost all auto-focus k-mount lens except the new PLM lens(es) should be compatible. Almost all manual focus K-mount lenses should be compatible with limitations on shooting and metering modes too.

The Pentax Camera Lens Compatibility Chart

tvdtvdtvd · 06-15-2018, 04:18 PM - **1 Like**

Which 100-300mm lens? Make? Model? If it's a k-mount lens it will work with a few very specific exceptions.

As for whether it's any good, again, make/model? You may have luck finding the lens here, possibly with user reviews.
Pentax Lenses - Pentax Lens Reviews & Lens Database

**aslyfox** · 06-15-2018, 04:20 PM - **1 Like**

this is another chart you might find interesting:

Pentax K-Mount Lens Series Explained: The differences between various Pentax lens series

In a nutshell

There are several series of Pentax K-mount lenses; the ones currently being produced include the DA (digital), DA L (cheap digital kit), D FA (full-frame, digital optimized), and FA (full-frame) series. While all Pentax K-mount lenses ever produced are compatible with all current Pentax DSLRs (in some cases with restrictions in that not all exposure modes of the camera are supported by old lenses), there are significant differences between each lens series and each has different features. Furthermore some of the newer lenses do not work with older cameras. We'll be exploring the differences between the various K-mount series lenses in this article

Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

**paulh** · 06-15-2018, 04:24 PM - **1 Like**

The K100D can use virtually any k-mount lens, except the Pentax SDM-type lenses, or the new 55-300 PLM. The K100D Super can make use of SDM lenses, however.

**aslyfox** · 06-15-2018, 04:34 PM - **1 Like**

Originally posted by paulh

The K100D can use virtually any k-mount lens, except the Pentax SDM-type lenses, or the new 55-300 PLM. The K100D Super can make use of SDM lenses, however.

DC, PLM or SDM: The lens has a built-in motor for autofocus (K10D, K100D and newer cameras can take advantage of this).

Not a Number · 06-15-2018, 05:23 PM - **1 Like**

Originally posted by Aslyfox

DC, PLM or SDM: The lens has a built-in motor for autofocus (K10D, K100D and newer cameras can take advantage of this).

My bad, I confuse PLM with KAF4.

The K100D is only a crippled KAF mount and lacks the power zoom contacts. Manual Focus only with DC, PLM or SDM.

The K100D Super is crippled KAF2 with the power zoom contacts.

Additionally KAF4 lenses will only shoot wide open as there is no way for the camera to control the iris. No firmware update for KAF4 support.

Refer to the above link compatibility chart and http://kmp.pentaxians.eu/technology/k-mount/crippled_af/

Last edited by Not a Number; 06-15-2018 at 05:45 PM.

pboyle · 06-15-2018, 09:03 PM

Originally posted by Not a Number

Almost all auto-focus k-mount lens except the new PLM lens(es) should be compatible. Almost all manual focus K-mount lenses should be compatible with limitations on shooting and metering modes too.

The Pentax Camera Lens Compatibility Chart

Thank you so much.A guy is selling his Pentax camera with the extra lens 100-300mm for $275. I asked him if he would sell the lens on its own and he asked what would I pay. Do you have a clue how much a second hand lens that size would be worth.

---------- Post added 06-15-18 at 09:07 PM ----------

Originally posted by tvdtvdtvd

Which 100-300mm lens? Make? Model? If it's a k-mount lens it will work with a few very specific exceptions.

As for whether it's any good, again, make/model? You may have luck finding the lens here, possibly with user reviews.
Pentax Lenses - Pentax Lens Reviews & Lens Database

I asked him but he hasn't replied back. He was selling a Pentax camera with the extra lens 100-300mm for $275. I asked how much for the lens on its own and he asked what I'd pay for it. I asked type of Pentax camera he had and what name the lens was but he hasn't answered back yet.

tvdtvdtvd · 06-15-2018, 09:55 PM - **1 Like**

Originally posted by pboyle

A guy is selling his Pentax camera with the extra lens 100-300mm for $275. I asked him if he would sell the lens on its own and he asked what would I pay. Do you have a clue how much a second hand lens that size would be worth.

Without further details, I'd say that price is very high. The 100-300, assuming it is a F or FA series Pentax lens, typically would sell for $30-$100.
If you're just after the lens, you could certainly find it for less than $275. I honestly would not pay more than $10-$20 for the vague information
you seem to have. What model of camera? What make and model of lens? What kind of condition? Have you seen photographs?
Why is the offer appealing when that lens can be readily found elsewhere for considerably less than $275. Have you searched for
comparisons?

Example:
Reduced: Tamron 24-135, DAL 50-200WR, FA 100-300 - PentaxForums.com

pboyle · 06-15-2018, 10:42 PM

Originally posted by pboyle

Hi all, I'm new to this site and was just wondering if anyone can help me. I have a Pentax K100D with a 18-50mm lens. Someone is selling a Pentax camera with an extra lens a 100-300mm lens. Would this lens be compatible and any good with my camera. I'm still learning how to use my camera.

The lens is a Sigma 100-300mm. Will this work with my K100D.

**Skodadriver** · 06-16-2018, 12:11 AM - **1 Like**

Originally posted by pboyle

The lens is a Sigma 100-300mm. Will this work with my K100D.

It will work on your K100D, I have one and seldom use it having found others that I prefer. It cost me about $25 I think.
If you are set on a zoom lens to 300mm the Pentax DA L 55-300mm can be found and is a better bet (assuming it is not damaged or has fungus) but lacks the quickshift ability that the DA (not L) has. You should be able to find a DA L for under $100.
Other budget to 300mm lenses such as the Sigma 70-300mm and the Tamron 70-300mm, both of which have a pseudo macro function can be found even cheaper. I believe I have seen the Tamron advertised brand new at $99.

swanlefitte · 06-16-2018, 12:29 AM - **1 Like**

Ebay says that lens trends at $56. There is 1 for $42 free shipping right now.

UMC · 06-16-2018, 01:47 AM

Originally posted by pboyle

The lens is a Sigma 100-300mm. Will this work with my K100D.

It will certainly work on the K100D.

However, "Sigma 100-300mm" is still ambiguous information. I know of the following 100-300mm lenses that Sigma produced:

Sigma 100-300 1:4 APO EX
Sigma 100-300mm 1:4 APO DG EX
Sigma APO DG 100-300mm 1:4 EX (2 versions)
Sigma Zoom 100-300mm 1:4.5-6.7 DL (3 generations, each in silver or black, the third genereation with chrome or black bayonet)
Sigma Zoom 100-300mm 1:4.5-6.7 UC (3 versions, 2 of them in silver)

While the 100-300 1:4 versions are better built and faster and therefore rather to be found in the 3-digit price range, I would not pay more than 50 US $ for the DL or UC versions.

**aslyfox** · 06-16-2018, 04:22 AM

lots of useful info available under " Lenses " above

links to Sigma lenses reviews

Sigma Lenses - Pentax Lens Review Database

current zooms

Sigma Lenses for Pentax: Current Zoom Lenses - Pentax Lens Review Database

legacy zooms

Sigma Lenses for Pentax: Legacy Zoom Lenses - Pentax Lens Review Database

_________________________

I had an old Tamron zoom that wasn't too bad as a starter zoom

Tamron AF 70-300mm F/4-5.6 LD Tele-Macro [1:2] (Model 772D)

https://www.pentaxforums.com/userreviews/tamron-af-70-300mm-f-4-5-6-ld-tele-...odel-772d.html

Originally posted by Skodadriver

. . . Other budget to 300mm lenses such as the Sigma 70-300mm and the Tamron 70-300mm, both of which have a pseudo macro function can be found even cheaper. I believe I have seen the Tamron advertised brand new at $99.

BTW a 1:2 macro isn't " pseudo macro ", it just isn't a 1:1 macro

**Skodadriver** · 06-16-2018, 04:37 AM

Originally posted by Aslyfox

BTW a 1:2 macro isn't " pseudo macro ", it just isn't a 1:1 macro

My mistake.

06-15-2018, 03:06 PM	#1
pboyle New Member Join Date: Jun 2018 Posts: 4	K100D lens compatibility question Hi all, I'm new to this site and was just wondering if anyone can help me. I have a Pentax K100D with a 18-50mm lens. Someone is selling a Pentax camera with an extra lens a 100-300mm lens. Would this lens be compatible and any good with my camera. I'm still learning how to use my camera.

06-16-2018, 01:47 AM	#13
UMC Senior Member Join Date: Dec 2012 Location: Vienna Photos: Gallery Posts: 205	Originally posted by pboyle The lens is a Sigma 100-300mm. Will this work with my K100D. It will certainly work on the K100D. However, "Sigma 100-300mm" is still ambiguous information. I know of the following 100-300mm lenses that Sigma produced: Sigma 100-300 1:4 APO EX Sigma 100-300mm 1:4 APO DG EX Sigma APO DG 100-300mm 1:4 EX (2 versions) Sigma Zoom 100-300mm 1:4.5-6.7 DL (3 generations, each in silver or black, the third genereation with chrome or black bayonet) Sigma Zoom 100-300mm 1:4.5-6.7 UC (3 versions, 2 of them in silver) While the 100-300 1:4 versions are better built and faster and therefore rather to be found in the 3-digit price range, I would not pay more than 50 US $ for the DL or UC versions. Last edited by UMC; 06-16-2018 at 03:36 AM.

06-16-2018, 04:22 AM	#14
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583	lots of useful info available under " Lenses " above links to Sigma lenses reviews Sigma Lenses - Pentax Lens Review Database current zooms Sigma Lenses for Pentax: Current Zoom Lenses - Pentax Lens Review Database legacy zooms Sigma Lenses for Pentax: Legacy Zoom Lenses - Pentax Lens Review Database _________________________ I had an old Tamron zoom that wasn't too bad as a starter zoom Tamron AF 70-300mm F/4-5.6 LD Tele-Macro [1:2] (Model 772D) https://www.pentaxforums.com/userreviews/tamron-af-70-300mm-f-4-5-6-ld-tele-...odel-772d.html Originally posted by Skodadriver . . . Other budget to 300mm lenses such as the Sigma 70-300mm and the Tamron 70-300mm, both of which have a pseudo macro function can be found even cheaper. I believe I have seen the Tamron advertised brand new at $99. BTW a 1:2 macro isn't " pseudo macro ", it just isn't a 1:1 macro Last edited by aslyfox; 06-16-2018 at 04:35 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Question about aperture ring and lens compatibility.	Simo.G	Film SLRs and Compact Film Cameras	6	06-03-2018 10:45 AM
K100D lens compatibility	1martin2	Pentax SLR Lens Discussion	8	12-08-2016 10:09 PM
K100D lens compatibility question	cif	Troubleshooting and Beginner Help	11	02-09-2012 04:00 PM
k1000 and K100d lens compatibility	germar	Pentax SLR Lens Discussion	8	09-10-2009 01:03 PM
Lens compatibility of K100D	ardabalkan	Pentax DSLR Discussion	5	06-22-2007 05:24 PM

06-15-2018, 03:36 PM - 1 Like	#2
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Almost all auto-focus k-mount lens except the new PLM lens(es) should be compatible. Almost all manual focus K-mount lenses should be compatible with limitations on shooting and metering modes too. The Pentax Camera Lens Compatibility Chart

06-15-2018, 04:18 PM - 1 Like	#3
tvdtvdtvd Veteran Member Join Date: Jan 2010 Posts: 1,665	Which 100-300mm lens? Make? Model? If it's a k-mount lens it will work with a few very specific exceptions. As for whether it's any good, again, make/model? You may have luck finding the lens here, possibly with user reviews. Pentax Lenses - Pentax Lens Reviews & Lens Database

06-15-2018, 04:20 PM - 1 Like	#4
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583	this is another chart you might find interesting: Pentax K-Mount Lens Series Explained: The differences between various Pentax lens series In a nutshell There are several series of Pentax K-mount lenses; the ones currently being produced include the DA (digital), DA L (cheap digital kit), D FA (full-frame, digital optimized), and FA (full-frame) series. While all Pentax K-mount lenses ever produced are compatible with all current Pentax DSLRs (in some cases with restrictions in that not all exposure modes of the camera are supported by old lenses), there are significant differences between each lens series and each has different features. Furthermore some of the newer lenses do not work with older cameras. We'll be exploring the differences between the various K-mount series lenses in this article Pentax K-Mount Lenses Explained: The differences between various Pentax lens series

06-15-2018, 04:24 PM - 1 Like	#5
paulh Site Supporter Join Date: Sep 2010 Location: DFW Texas/Ventura County, CA Photos: Gallery \| Albums Posts: 33,306	The K100D can use virtually any k-mount lens, except the Pentax SDM-type lenses, or the new 55-300 PLM. The K100D Super can make use of SDM lenses, however.

06-15-2018, 04:34 PM - 1 Like	#6
aslyfox Seeker of Knowledge Join Date: Aug 2016 Location: Topeka, Kansas Photos: Gallery \| Albums Posts: 24,583	Originally posted by paulh The K100D can use virtually any k-mount lens, except the Pentax SDM-type lenses, or the new 55-300 PLM. The K100D Super can make use of SDM lenses, however. DC, PLM or SDM: The lens has a built-in motor for autofocus (K10D, K100D and newer cameras can take advantage of this).

06-15-2018, 05:23 PM - 1 Like	#7
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Originally posted by Aslyfox DC, PLM or SDM: The lens has a built-in motor for autofocus (K10D, K100D and newer cameras can take advantage of this). My bad, I confuse PLM with KAF4. The K100D is only a crippled KAF mount and lacks the power zoom contacts. Manual Focus only with DC, PLM or SDM. The K100D Super is crippled KAF2 with the power zoom contacts. Additionally KAF4 lenses will only shoot wide open as there is no way for the camera to control the iris. No firmware update for KAF4 support. Refer to the above link compatibility chart and http://kmp.pentaxians.eu/technology/k-mount/crippled_af/ Last edited by Not a Number; 06-15-2018 at 05:45 PM.

06-15-2018, 09:03 PM	#8
pboyle New Member Join Date: Jun 2018 Posts: 4 Original Poster	Originally posted by Not a Number Almost all auto-focus k-mount lens except the new PLM lens(es) should be compatible. Almost all manual focus K-mount lenses should be compatible with limitations on shooting and metering modes too. The Pentax Camera Lens Compatibility Chart Thank you so much.A guy is selling his Pentax camera with the extra lens 100-300mm for $275. I asked him if he would sell the lens on its own and he asked what would I pay. Do you have a clue how much a second hand lens that size would be worth. ---------- Post added 06-15-18 at 09:07 PM ---------- Originally posted by tvdtvdtvd Which 100-300mm lens? Make? Model? If it's a k-mount lens it will work with a few very specific exceptions. As for whether it's any good, again, make/model? You may have luck finding the lens here, possibly with user reviews. Pentax Lenses - Pentax Lens Reviews & Lens Database I asked him but he hasn't replied back. He was selling a Pentax camera with the extra lens 100-300mm for $275. I asked how much for the lens on its own and he asked what I'd pay for it. I asked type of Pentax camera he had and what name the lens was but he hasn't answered back yet.

06-15-2018, 09:55 PM - 1 Like	#9
tvdtvdtvd Veteran Member Join Date: Jan 2010 Posts: 1,665	Originally posted by pboyle A guy is selling his Pentax camera with the extra lens 100-300mm for $275. I asked him if he would sell the lens on its own and he asked what would I pay. Do you have a clue how much a second hand lens that size would be worth. Without further details, I'd say that price is very high. The 100-300, assuming it is a F or FA series Pentax lens, typically would sell for $30-$100. If you're just after the lens, you could certainly find it for less than $275. I honestly would not pay more than $10-$20 for the vague information you seem to have. What model of camera? What make and model of lens? What kind of condition? Have you seen photographs? Why is the offer appealing when that lens can be readily found elsewhere for considerably less than $275. Have you searched for comparisons? Example: Reduced: Tamron 24-135, DAL 50-200WR, FA 100-300 - PentaxForums.com

06-15-2018, 10:42 PM	#10
pboyle New Member Join Date: Jun 2018 Posts: 4 Original Poster	Originally posted by pboyle Hi all, I'm new to this site and was just wondering if anyone can help me. I have a Pentax K100D with a 18-50mm lens. Someone is selling a Pentax camera with an extra lens a 100-300mm lens. Would this lens be compatible and any good with my camera. I'm still learning how to use my camera. The lens is a Sigma 100-300mm. Will this work with my K100D.

06-16-2018, 12:11 AM - 1 Like	#11
Skodadriver Site Supporter Join Date: May 2015 Location: Hampshire Photos: Gallery \| Albums Posts: 892	Originally posted by pboyle The lens is a Sigma 100-300mm. Will this work with my K100D. It will work on your K100D, I have one and seldom use it having found others that I prefer. It cost me about $25 I think. If you are set on a zoom lens to 300mm the Pentax DA L 55-300mm can be found and is a better bet (assuming it is not damaged or has fungus) but lacks the quickshift ability that the DA (not L) has. You should be able to find a DA L for under $100. Other budget to 300mm lenses such as the Sigma 70-300mm and the Tamron 70-300mm, both of which have a pseudo macro function can be found even cheaper. I believe I have seen the Tamron advertised brand new at $99.

06-16-2018, 12:29 AM - 1 Like	#12
swanlefitte Pentaxian Join Date: May 2015 Location: Minneapolis Photos: Gallery Posts: 4,068	Ebay says that lens trends at $56. There is 1 for $42 free shipping right now.

06-16-2018, 04:37 AM	#15
Skodadriver Site Supporter Join Date: May 2015 Location: Hampshire Photos: Gallery \| Albums Posts: 892	Originally posted by Aslyfox BTW a 1:2 macro isn't " pseudo macro ", it just isn't a 1:1 macro My mistake.