Updated (August 2010): Compare the Nikon D3100 vs Sony SLT-A33

Sony SLT A33 vs Nikon D3100

Sony SLT-A33


Nikon D3100



Reasons to buy the Sony SLT A33

Full HD
Movie format
1080p @ 30fps
Wide dynamic range
Dynamic range
12.6 EV
High resolution screen
Screen resolution
921k dots
Image stabilization
Image stabilization
  1. Sensor shift

Reasons to buy the Nikon D3100

Supports 24p
24p movies
For that film look
Startup delay
Almost no delay when powering up
400 ms startup delay
Really small
Prosumer size (124×97×74 mm)


Explore our gallery of 48 sample photos taken by the Nikon D3100.
Explore our gallery of 50 sample photos taken by the Sony SLT-A33.


Sony SLT-A33 Competitors

Sony SLT A58

Sony SLT A58

Entry-level DSLR

$671 body only

$498 with 18-55mm lens

Supports 24p Supports 24p
Low light performance Lower noise at high ISO
Screen size Much smaller screen
Sony SLT A37

Sony SLT A37

Entry-level DSLR

$964 with 18-55mm lens

Supports 24p Supports 24p
Low light performance Lower noise at high ISO
Screen resolution Much lower resolution screen
Sony SLT-A55

Sony SLT A55

Entry-level DSLR

$900 body only

$799 with 18-55mm lens

Low light performance Lower noise at high ISO
Continuous shooting Shoots much faster
Dynamic range Less dynamic range

Nikon D3100 Competitors

Nikon D3200

Nikon D3200

Entry-level DSLR

$249 body only

$299 - $447 with 18-55mm lens

Screen resolution Much higher resolution screen
Dynamic range More dynamic range
Thickness Thicker
Canon EOS Rebel T5

Canon EOS Rebel T5

Entry-level DSLR

$399 body only

$310 - $399 with 18-55mm lens

Screen resolution Significantly higher resolution screen
True resolution Higher true resolution
Color depth Worse color depth
Nikon D3300

Nikon D3300

Entry-level DSLR

$369 - $447 with 18-55mm lens

Low light performance Much lower noise at high ISO
Screen resolution Much higher resolution screen
Size Slightly larger


Sony SLT-A33

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Nikon D3100

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Showing 25 comments

thisguy (8:09 PM, February 03, 2013)
today i used my a33 for a stop motion video, took 720 pics, and i still have 55% batter, why does it says there 270?
Avatar for Siddarth Prakash Siddarth Prakash (5:30 AM, April 11, 2012)
hey there! i am planning on getting my frist dslr camera... i wanna know which is better the canon 1100d or the nikon d3100 or the sony A33.... i understand that sony has a low range of lens in the offering... will that make any difference when compared to the range that nikon or canon has....
Avatar for The Badger The Badger (4:23 AM, February 02, 2012)
As a D3100 owner, I kind of feel embarrassed by snapsorts scores. Certainly I am rooting for my camera, but this is just too much.
Melnikphotography (4:15 AM, January 01, 2012)
Popularity? Popularity really effect fps, ISO range and image quality. I liked the site until I saw how popularity saved an inferior camera from being humiliated in a head to head contest.
Pruthvidesai7 (3:46 PM, October 08, 2011)
I have used both DSLR's I seriously prefer Sony-A33 Its faster and better.
hand (9:56 AM, May 28, 2011)
Just a suggestion on this. Maybe the user should be able to change the weight of a factor depending on what was important to them so they can find the right camera for them :)
Avatar for wolfdoctor wolfdoctor (1:42 PM, May 14, 2011)
Popularity really shouldn't affect the scoring.  This is a prime example, where the a33 had 5 yellow highlighted advantages over the d3100, while the d3100's only advantage was popularity.  The a33 should have won hands-down. 
Avatar for norcalrouleur norcalrouleur (7:37 AM, May 05, 2011)
Thanks for the site. Today I returned a previously bought D3100 and purchased the A33. The video was the kicker. No external mic combined with poor audio didn't live up to the D3100 billing. As a newbie to the DSLR market, I highly recommend removing the popularity aspect as this has no bearing on performance. The A33 offers so much more for the price yet gets a bum rap because of a lack of popularity...doesn't make sense!
Avatar for Snapsort Snapsort (1:45 PM, April 25, 2011)
We are working on it.
Jakeymarmot (4:07 PM, April 24, 2011)
I think you should hurry up and change it :)
Jakeymarmot (5:27 PM, April 18, 2011)
I used to trust Snapsort, but now I see that all scores are corrupt because of this popularity issue. It is insane that your score calculator multiplies the score by 100, as it means no scores can be trusted and they are all practically based on how popular the camera is! I think the weight of popularity needs to be drastically cut as something that is genuinely important is losing out. Without popularity, the Sony would beat most Canons and Nikons hands down.
Avatar for Snapsort Snapsort (7:59 PM, April 06, 2011)
Hi Dz1! Alex Black here.

I just pointed you to that discussion because you asked "Snapsort needs to explain why...", that thread has some relevant information to that question.

You're welcome to say that nothing is going to change. We do plan to change things though, I apologize for not changing it fast enough for your liking!
Dz1 (7:49 PM, April 06, 2011)
The last reply on that thread is 5 months old and from what the snapsort employee Alex Black was saying in that thread, nothing is going to change and nothing has changed since as far as i can see.

So what's the point in wasting my time there when you've already made up your minds ? The score is skewed massively and unfairly towards the big two camera makers Canon and Nikon and that will continue if what Alex Black is saying is correct.

I have no idea why you haven't been sued over this by the less popular camera makers. I'm no expert, but it seems to me like they've got a possible case of defamation against snapsort.
Avatar for Snapsort Snapsort (2:49 PM, April 06, 2011)
Hi Dz1, feel free to join in our discussion about popularity at our support community. We do have plans to lessen or eliminate popularity in the future, so stay tuned.
Dz1 (2:46 PM, April 06, 2011)
It's even worse than you all think. Snapsort penalises the Sony by 27 points because of popularity. It's bonkers and makes no sense.

If you take popularity totally out of the equation, the D3100 scores 47% and the A33 scores 67% making the A33 the clear winner by some margin.

Snapsort needs to explain why they do this because it looks to me like the results are being skewed to support the big two camera manufacturers Canon and Nikon. So they need to explain why they give such a huge amount of points to popularity.
Avatar for Snapsort Snapsort (2:04 AM, April 01, 2011)
Hi Dana, to get good macro shots you need a good macro lens, I don't think the kit lens that comes with either of these cameras is particularly good at macro shots.

You should check out our sister site, http://lenshero.com, and explore the Nikon D3100 macro lenses as well as the Sony SLT-A33 macro lenses!
Dana (1:40 AM, April 01, 2011)
Hi, I've been looking at both these cameras for a long time and I really can't decide which one I like better. I'm really into macro shots so which camera do you suggest for quality macro photos?
Mcaro (2:14 AM, March 29, 2011)
Thanks I didnt know about the existance of such programs. You have been really helpful
Avatar for Snapsort Snapsort (2:00 PM, March 28, 2011)
ISO is a measurement of how sensitive the camera sensor is to light, here is a great article on ISO.
The Sony SLT-A33 is your best bet if you will be doing a lot of video recording, it has auto focus during recording, a mic jack, a flip out screen and there are many programs that can easily convert 30fps into 24fps.
I hope that helps.
Mcaro (4:17 AM, March 27, 2011)
Hi, I am kinda new in this things, I have never bought a slr camera, so, I was wondering which one (of the two above) would you buy?, I am pretty interested in video recording, but you know in one side we have 24p but no microphone jack and in the other we have 30p but a microphone jack. By the way, I don't understand what ISO means here.
KNA (3:08 PM, March 23, 2011)
I agree...when you look at the scores based on PERFORMANCE, my take-away is the Sony wins. I have never been one to put to much stock in popularity.
Jakeymarmot (4:12 PM, March 14, 2011)
Oh, I see. So here the Sony looses 10 points on the recommendation just because of popularity? Slightly unfair I think as popularity shouldn't really matter when choosing a camera. Nikons and Cannons are going to get recommended even if, say a Sony is actually a better camera.
Sorry to have a go, I actually really like this site and it has really helped me narrow my choices down!
Avatar for Snapsort Snapsort (2:39 PM, March 13, 2011)
Hi Jake, when Snapsort makes its recommendation calculates a score for each camera based on what we think are important features. If you click explain score you can see how it works.
Jakeymarmot (0:17 PM, March 13, 2011)
Hi, I was just wondering which one you think I should buy.
The list of reasons to choose the Sony is twice as long as the Nikon's, yet in the scores you recommend the Nikon?
Makes no sense!
jopojo (5:07 PM, February 25, 2011)
I feel the same as you Lovepreetbajwa but can't get anyone in this thread to respond and help me out.