Pentax K-r, wide angle lens help!

theonlyrockstar · 05-11-2011, 10:20 AM

I am n00ber than n00b when it comes to photography and lenses. Please bear with me.

I recently picked up a Pentax K-r. I fell in love, yadda yadda yadda and wanted a wide angle lens. More than a few Google searches recommended the Sigma 10-20mm F4-5.6 EX DC lens. I loved the samples photos I found online and purchased. Until...

The lens is too big? I know the K-r is a tiny camera but I thought it took some normal sized lenses. Help? Am I putting this on wrong? Are there special lenses that the K-r needs due to its smaller size? If I bought the wrong one, can someone point me in the right direction for some quality lenses for this camera?

Sorry & thanks!

shadowsonoureyes · 05-11-2011, 10:26 AM

Did you buy the pentax mount?? Should fit your camera if you did...

**blackcloudbrew** · 05-11-2011, 10:34 AM

As long as you have the proper k-mount on the sigma, it will work on your camera. Lenses come in a lot of different sizes depending on the focal length and speed of the lens. I have some long lenses that are big and with my K-5 attached it looks like the camera was an after thought. It all works just fine though.

The outside of the camera doesn't have anything 'really' to do with this inside as far as the sensor goes. My daughter has this lens for her Canon. It is a great wide angle lens. Just get it.

Ubuntu_user · 05-11-2011, 10:38 AM

That lens (sigma 10-20mm) will definitely fit on your K-r (just as long as it's in K mount, like BCB mentioned). However, it will be significantly larger than the kit lens you're use to (I assume).

theonlyrockstar · 05-11-2011, 10:39 AM

Is the k-mount something that I need to purchase separately from the lens or is it something that just comes built-on or with the lens? I've already purchased the lens, it just seems to mismatch my camera body when I try to attach it.

theonlyrockstar · 05-11-2011, 10:41 AM

Can someone please explain the k-mount further? Is that something I need to purchase separately or is that built-on to the actual lens? Thanks!

InlawBiker · 05-11-2011, 10:48 AM

Look on the box the lens came in. Does it happen to say Nikon or Canon on it somewhere?

eddie1960 · 05-11-2011, 10:48 AM

built into the lens. as long as you buy the one labeled for pentax (as opposed to for canon etc). if you mean the lens itself is huge, yep wide angle zooms can be very large. if you want wide angle without the huge size the DA 15 limited should fit the bill (won't give the really wide effect of the 10-20 at 10 though)
Welcome to the wonderful world of LBA
p.s. I hear the tamron 10-24 is a pretty nice lens as well, also pretty big though

Marc Sabatella · 05-11-2011, 10:48 AM

No, the K-mount is not some extra thing you buy - it's the *type* of mount used on the lens. Third party lenses - ones from not made by Pentax but rather by companies like Sigma or Tamron - are made available in different mounts for different camera - K-mount for Pentax, EF for Canon, etc. If you bought the Canon or Nikon version of the lens, it won't fit your Pentax - you need to buy the Pentax version. And that will either be marked Pentax or K-mount.

theonlyrockstar · 05-11-2011, 10:52 AM

Ok, there we have it. Thanks guys. It says "for Canon AF". Oof. I suppose this means I'll need to find a way to sell this expensive thing and pick up the proper "for Pentax" lens. Sigh.

eddie1960 · 05-11-2011, 10:55 AM

Originally posted by theonlyrockstar

Ok, there we have it. Thanks guys. It says "for Canon AF". Oof. I suppose this means I'll need to find a way to sell this expensive thing and pick up the proper "for Pentax" lens. Sigh.

oof is right, where did you buy, most dealers would let you exchange it but the odd one may charge restocking. hard way to learn the lesson
if you are buying used keep an eye on the forum marketplace. some good product there always

abhay kashalkar · 05-11-2011, 10:57 AM

May be you can return it to the store you bought it from ,and request a replacement with the pentax mount.
by the way ,I have the K-r and the 10-24 Tamron, which is a very decent lens as well.

**blackcloudbrew** · 05-11-2011, 11:10 AM

Ouch, I was sort of afraid that might have been the problem. Well, experience costs I guess. I'd try to exchange it. Best of luck (seriously) with that.

theonlyrockstar · 05-11-2011, 11:21 AM

I purchased from Amazon, it looks like I'll just be paying a few bucks for shipping. New/proper lens is on the way. Thanks you guys!!!

eddie1960 · 05-11-2011, 11:52 AM

cool enjoy the lens

05-11-2011, 10:20 AM	#1
theonlyrockstar New Member Join Date: May 2011 Location: Chicago Posts: 5	Pentax K-r, wide angle lens help! I am n00ber than n00b when it comes to photography and lenses. Please bear with me. I recently picked up a Pentax K-r. I fell in love, yadda yadda yadda and wanted a wide angle lens. More than a few Google searches recommended the Sigma 10-20mm F4-5.6 EX DC lens. I loved the samples photos I found online and purchased. Until... The lens is too big? I know the K-r is a tiny camera but I thought it took some normal sized lenses. Help? Am I putting this on wrong? Are there special lenses that the K-r needs due to its smaller size? If I bought the wrong one, can someone point me in the right direction for some quality lenses for this camera? Sorry & thanks!

05-11-2011, 10:55 AM	#11
eddie1960 Veteran Member Join Date: Aug 2010 Location: Toronto Photos: Gallery \| Albums Posts: 13,667	Originally posted by theonlyrockstar Ok, there we have it. Thanks guys. It says "for Canon AF". Oof. I suppose this means I'll need to find a way to sell this expensive thing and pick up the proper "for Pentax" lens. Sigh. oof is right, where did you buy, most dealers would let you exchange it but the odd one may charge restocking. hard way to learn the lesson if you are buying used keep an eye on the forum marketplace. some good product there always Last edited by eddie1960; 05-11-2011 at 11:06 AM.

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
wide angle accesory lens for Pentax kit lens?	jlaubza	Pentax DSLR Discussion	16	08-23-2011 04:51 PM
What wide angle lens for Pentax FF?	ozlizard	Pentax SLR Lens Discussion	8	03-02-2010 06:05 AM
Wide-angle lens: Sigma 10-20mm f3.5 or Pentax 12-24mm ?	AirSupply	Pentax SLR Lens Discussion	8	02-24-2010 07:03 PM
For Sale - Sold: Pentax SMC 24mm F3.5 24/3.5 Super Wide Angle Lens	frank	Sold Items	2	11-02-2009 08:10 PM
Which wide angle lens is recommended for a Pentax K1000?	shokastace	Pentax SLR Lens Discussion	16	09-10-2009 07:56 PM

05-11-2011, 10:26 AM	#2
shadowsonoureyes Senior Member Join Date: Mar 2011 Location: British Columbia Posts: 137	Did you buy the pentax mount?? Should fit your camera if you did...

05-11-2011, 10:34 AM	#3
blackcloudbrew Loyal Site Supporter Join Date: Mar 2009 Location: Cotati, California USA Photos: Gallery \| Albums Posts: 4,461	As long as you have the proper k-mount on the sigma, it will work on your camera. Lenses come in a lot of different sizes depending on the focal length and speed of the lens. I have some long lenses that are big and with my K-5 attached it looks like the camera was an after thought. It all works just fine though. The outside of the camera doesn't have anything 'really' to do with this inside as far as the sensor goes. My daughter has this lens for her Canon. It is a great wide angle lens. Just get it.

05-11-2011, 10:38 AM	#4
Ubuntu_user Veteran Member Join Date: Mar 2010 Photos: Gallery \| Albums Posts: 1,545	That lens (sigma 10-20mm) will definitely fit on your K-r (just as long as it's in K mount, like BCB mentioned). However, it will be significantly larger than the kit lens you're use to (I assume).

05-11-2011, 10:39 AM	#5
theonlyrockstar New Member Join Date: May 2011 Location: Chicago Posts: 5 Original Poster	Is the k-mount something that I need to purchase separately from the lens or is it something that just comes built-on or with the lens? I've already purchased the lens, it just seems to mismatch my camera body when I try to attach it.

05-11-2011, 10:41 AM	#6
theonlyrockstar New Member Join Date: May 2011 Location: Chicago Posts: 5 Original Poster	Can someone please explain the k-mount further? Is that something I need to purchase separately or is that built-on to the actual lens? Thanks!

05-11-2011, 10:48 AM	#7
InlawBiker Senior Member Join Date: Feb 2011 Location: Seattle, WA Photos: Gallery Posts: 123	Look on the box the lens came in. Does it happen to say Nikon or Canon on it somewhere?

05-11-2011, 10:48 AM	#9
Marc Sabatella Veteran Member Join Date: Sep 2006 Location: Denver, CO Photos: Gallery Posts: 10,685	No, the K-mount is not some extra thing you buy - it's the type of mount used on the lens. Third party lenses - ones from not made by Pentax but rather by companies like Sigma or Tamron - are made available in different mounts for different camera - K-mount for Pentax, EF for Canon, etc. If you bought the Canon or Nikon version of the lens, it won't fit your Pentax - you need to buy the Pentax version. And that will either be marked Pentax or K-mount.

05-11-2011, 10:52 AM	#10
theonlyrockstar New Member Join Date: May 2011 Location: Chicago Posts: 5 Original Poster	Ok, there we have it. Thanks guys. It says "for Canon AF". Oof. I suppose this means I'll need to find a way to sell this expensive thing and pick up the proper "for Pentax" lens. Sigh.

05-11-2011, 10:57 AM	#12
abhay kashalkar New Member Join Date: May 2008 Location: Mumbai,India Photos: Gallery \| Albums Posts: 9	May be you can return it to the store you bought it from ,and request a replacement with the pentax mount. by the way ,I have the K-r and the 10-24 Tamron, which is a very decent lens as well.

05-11-2011, 11:10 AM	#13
blackcloudbrew Loyal Site Supporter Join Date: Mar 2009 Location: Cotati, California USA Photos: Gallery \| Albums Posts: 4,461	Ouch, I was sort of afraid that might have been the problem. Well, experience costs I guess. I'd try to exchange it. Best of luck (seriously) with that.

05-11-2011, 11:21 AM	#14
theonlyrockstar New Member Join Date: May 2011 Location: Chicago Posts: 5 Original Poster	I purchased from Amazon, it looks like I'll just be paying a few bucks for shipping. New/proper lens is on the way. Thanks you guys!!!

05-11-2011, 11:52 AM	#15
eddie1960 Veteran Member Join Date: Aug 2010 Location: Toronto Photos: Gallery \| Albums Posts: 13,667	cool enjoy the lens