Pentax K-r vs Nikon D3100

Pentax K-r


Nikon D3100



Reasons to buy the Pentax K-r

High resolution screen
Screen resolution
920k dots
Large viewfinder
Viewfinder size
Image stabilization
Image stabilization
  1. Sensor shift
Rapid fire
Continuous shooting
6 fps

Reasons to buy the Nikon D3100

Supports 24p
24p movies
For that film look
Movie continuous focus
Movie continuous focus
Makes it easy to get in-focus movies
Lens availability
Slightly more lenses available
230 lenses
Great viewfinder


Explore our gallery of 48 sample photos taken by the Nikon D3100.
Explore our gallery of 50 sample photos taken by the Pentax K-r.


Pentax K-r Competitors

Pentax K-x

Pentax K-x

Entry-level DSLR

$1,495 with 18-55mm lens

Supports 24p Supports 24p
Size Smaller
Screen resolution Much lower resolution screen
Canon EOS 70D

Canon EOS 70D


$1,877 with 18-135mm lens

True resolution Much higher true resolution
Supports 24p Supports 24p
Image stabilization No image stabilization
Pentax K-7

Pentax K-7

Entry-level DSLR

$656 body only

True resolution Much higher true resolution
Weather sealed Weather sealed
Continuous shooting Shoots slower

Nikon D3100 Competitors


Canon EOS M100

Mirrorless interchangeable-lens

$379 body only

$449 with 15-45mm lens

True resolution Much higher true resolution
Size Much smaller
Viewfinder No viewfinder
Nikon D3200

Nikon D3200

Entry-level DSLR

$550 body only

True resolution Much higher true resolution
Screen resolution Much higher resolution screen
Size Larger
Nikon D3300

Nikon D3300

Entry-level DSLR

$473 body only

$399 with 18-55mm lens

True resolution Much higher true resolution
Screen resolution Much higher resolution screen
Size Larger


Pentax K-r

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Nikon D3100

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Showing 21 comments

Mako (7:37 AM, March 28, 2012)
this Pentax camera has a focus issue not fixed by pentax.....
Bechsiga (8:15 PM, January 18, 2012)
Clearly the Pentax K-r is supperior to the D3100 and on other ways to the D5100. It´s so pointless  and silly to evaluate cameras by popularity. Leicas, no body has one, should get 1 point on popularity and noboby can say it´s a bad camera. Honestly this don´t speak very good about your credibility.
Mike (7:53 AM, November 25, 2011)
The Nikon D3100 is better, get over it.
Shajith_703 (9:17 AM, November 04, 2011)
I prefer Kr, Build Quality, Fast Continuos exposure, Picture quality, AA Battery option, look Compact, Its far better than D3100
Thalia G (8:15 PM, October 15, 2011)
Hello Eyesk,thank you that was really helpful!I have a Pentax K1000 as well,which my father gave to me and I love it.I was thinking about buying the k-r but I wasn't sure,but know that I know the lenses are compatible i certainly will!I will try them first of course..have a good night
Avatar for ollin ollin (5:57 PM, September 20, 2011)
Also, are you kidding me? The K-r beats the hell out of the D3100 in all image quality related metrics, how can the d3100 win?
Avatar for ollin ollin (5:56 PM, September 20, 2011)
The K-r should get points for the fact that you can use AA batteries with it, in which case you can take 1000+ pictures, way more than the D3100, and much more convinient in travel situations.
Spider Pig (3:06 PM, September 17, 2011)
Ridiculously biased review!!!!!
Drom100 (5:40 PM, August 29, 2011)
 I always go to your " explain scores " page to see if the popularity
score is what has determined the recommendation, and if is has, I give it the consideration it is due.  I don't really care how popular a camera is when I am trying to determine which camera
has the best specifications and shoots the best images. If I was
purchasing a camera based on it's popularity, I probably wouldn't be
bothering to sift through the wonderful detail you have on the
specifications; I would buy based on the safety of the brand and nothing else.   Brand popularity is somewhat important, but not important enough to ignore the actual merits of the camera.
Rustyrat1 (9:25 AM, August 07, 2011)
Strangely biased view in making a recommendation. What has popularity got do with analysing which camera to buy? If take the popularity scores out then the Pentax just wins on your scoring system. (Pentax k-r 251.2 Nikon D3100 248..1) so I guess thats almost a draw.
Vcfh1945 (10:27 PM, August 01, 2011)
If you check out or google "top 11 DSL's" you will find the Pentax K-r is rated at no. 3 behind the Pentax K-5 at 2 and above the Nikon D5100 and Canon 600D. The Nikon 3100D is not mentioned.
Hvcastro3 (7:10 PM, May 06, 2011)
Wao.. thats why l love Snapsort!! a lot of intelligent people!! i have nothing more to say.. everything was said!!
i mean.. the same things i think when i was comparing the cameras is what everyone here is complaining about.. thanks.
Snapper (0:27 AM, March 21, 2011)
OOps! Sorry just realised I've just repeated what others have already said. Still it shows there are a lot of other folk out there who think the same. Whilst I'm at it though, build quality IS an important factor but doesn't figure in your calculations.
Snapper (0:20 AM, March 21, 2011)
Snapsort could you please remove "popularity" from your scoring criteria. Whether or not a camera is popular or not with other people is really of no significance. We look to you for unbiased objective scoring. Canon and Nikon sell enough cameras without your help tipping the balance in their favour. I was amazed that the Nikon 3100 gained a higher score than the Pentax K-r, then I saw that 35 points had been added to the Nikon for "popularity". Without that the score would have gone rightly in favour of the Pentax. Canon and Nikon have huge publicity and lobying budgets without any further help from independant reviewers. Otherwise your site is amazing.
Avatar for Snapsort Snapsort (9:40 PM, February 26, 2011)
Hi Slashby, thanks for the suggestion. Right now we're busy with a few other things, but we've got that on our list to consider for the future!
slashby (6:11 PM, February 26, 2011)
SNAPSORT: could you enable a way to toggle on and turn off different criteria in the scoring system? I am not as interested in popularity or video in dslrs and I am sure there are certain criteria that are either essential or non-issues for other users. When I remove popularity scores (bc they are not important to me, but maybe to others), it changes the overall scores considerably. Just a thought although it may be difficult to implement from your end. Thanks for keeping up such a nice site.
Eyesk (6:19 AM, February 20, 2011)
Oh, and something else I neglected to point out... you award ~12.5 points to the D3100 for having 169 lens available, and ~5.6 points to the K-R for having 90 lens available. Either way that is a lot of lens available to each camera, BUT are you factoring in that the K-R will accept NON-DSLR lens from earlier Pentax Cameras? If you are already a Pentax owner of an older Pentax (ESPECIALLY a film-based Pentax), that is an BIG DEAL - you can use use that great Pentax lens that you bought for your Pentax K1000 (what I have, but basically any past film-based Pentax) and slap in on any new Pentax DSLR. You cannot do that with the Nikon. This is my limited experience and info from other Pentax users, so you may want to double-check that your lens is indeed compatible - but I have not encountered anything to indicate to the contrary. Therefore, if you are an existing Pentax owner, this is a significant incentive. Hence, I feel too many points go to the D3100 on the matter of lens availability, and as such the slight point difference between the two camera shifts more in favor of the Pentax. Hope that helps.
Eyesk (11:42 PM, February 18, 2011)
I very much appreciate your information and how it is presented. But regarding your giving the "nod" to the D3100, it seems some of your decision may be skewed (for some buyers) by the amount of points awarded for its video capabilities. The video aspect of the equation is quite un-important for me. While for some people, it would be a big deal, and then the D3100 should clearly be favored. ALSO, if the recommendation is based to any degree on price, note that the links at the top of the page are to a body-only D3100 on the Amazon website, while the link for the K-R is for a body & lens set - so that really isn't an apples-to-apples comparison. In fact many websites I've priced these on tend have the K-R priced better than the D3100. Hence, if price is important to you, and you don't care that much about the video capability, then I believe the K-R would be the recommended model.
Avatar for Snapsort Snapsort (3:11 PM, February 06, 2011)
Hi Nanochan1, we agree! Snapsort has the K-r having a 920k screen, its the D3100 that has the 230k screen! You can confirm on the specs page.
nanochan1 (3:04 PM, February 06, 2011)
hi, your K-r specs is wrong. please check it again.

for 1, the LCD is 921k instead of 230
WerT (1:41 AM, January 17, 2011)
Popularity is a factor in which camera is better? This is the stupidest thing i've ever seen.