Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
  
6mp camera vs 14mp camera
Posted By: little laker, 01-25-2008, 11:00 PM

With the introduction of the new 14mp Pentax coming out I think that it's about the best time to post a comparison with my 6mp Pentax K100D and my 14mp Sigma SD14.

I modified a Pentax M-Mount 50mm f2 lens to fit both cameras, by removing the aperture leaver and the plastic ring around it.
Here's the before picture

after

This mod also allows you to use AV with the K, and M mount lenses on a Pentax camera.
Which is what I did with this test.

Everything was shot on the same tripod, without moving it, ISO 200, F8, and pop-up flash. In AV making my life a little easier.

The raw files were saved as JPG, without any processing, and then re-sized to 800 pixels (posted size), or 2500 pixels, pixel peering size.

K100

for the pixel peepers

SD14

for the pixel peepers

K100

for the pixel peepers

SD14

for the peepers

I don't think that I can possibly make the test more fair, at this time.

I'll be watching my band width, and might remove the large images some time next month if it looks like I might exceed it.

Just a quick edit, the Sigma has a crop factor of 1.7, vs the Pentax 1.5
This is why they appear a little larger

Last edited by little laker; 01-25-2008 at 11:09 PM.
Views: 4,793
01-26-2008, 08:03 AM   #16
Loyal Site Supporter
Loyal Site Supporter
Sailor's Avatar

Join Date: Nov 2006
Location: Coastal Texas
Photos: Gallery
Posts: 23,866
Thanks, Stu. A useful real-world comparison, which once again demonstrates that effects of going from 6-10 to 12-14 mp are pretty subtle under most circumstances, since doubling resolution requires quadrupling the number of mp. My bleary old eyes'll not register the difference, I'm sure. However, how the new sensor handles noise is another issue - if it beats my DS2 and K10D in this regard, I may be tempted by a K20D or its inevitable successor.

Jer

01-26-2008, 09:41 AM   #17
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,709
Original Poster
I'll do a couple of natural light tests today. And post them tonight some time, in a new thread.

QuoteOriginally posted by Tom M Quote
Hey Little Laker - How do you like the Bogen 3047 tilt/pan head?
Mines really the Manfrotto #029 MKR version Tom, and I love it.
I think that they are pretty well the same thing.

The only thing that I don't like at times is the weight of it, while going for hikes. I usually use a Walmart Special Samsonite for that.

It easily handles my Mamiya 645 film camera.
01-26-2008, 10:02 AM   #18
Inactive Account




Join Date: Oct 2006
Location: Boise, Idaho
Photos: Gallery | Albums
Posts: 1,413
Stu, either way the Foveon sensor is pretty cool technology, making it all the more interesting that the K100 holds up so well against it. Can't wait to see more images. Yay Pentax!
01-26-2008, 04:48 PM   #19
Inactive Account




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,561
Stu - You do realize that when you use the pop-up flash with an M-lens, the flash always fires at FULL power, so you'd have to do some guide number/distance calculations to determine what f-stop/ISO to use at different distances. That's why the shot of the P&S is quite overexposed. I'm with d.bradley, can't really tell anything from this test.

Since you're using a tripod and static subjects, how about just take shots without flash?

01-26-2008, 07:10 PM   #20
Veteran Member




Join Date: Sep 2006
Photos: Gallery
Posts: 5,709
Original Poster
egordon, removing the aperture leaver like that allows you to use AV. Which is the setting that I was shooting in. So the camera was metering it's self.

I set the other settings to zero.

I wanted a quick and simple test which anyone could try on their own, with identical lenses. Which in my opinion is where the image quality comes from.

I could have easily altered one cameras settings or another with just the simple press of a button, but that wouldn't be fair.

I do have a couple of natural light pic's from earlier today, which I still have to look at.
There was at least the same amount of difference between them, however I'll process them a little this time, so the exposures look similar.

Plus I'll be setting up a light, and try taking some pic's of a basket with tomorrows pasta sauce ingredients in it.
If the Sigma's colours are as good as they claim the Pentax will have troubles in this test
01-26-2008, 07:40 PM   #21
Inactive Account




Join Date: Dec 2006
Location: Outside of Philly
Posts: 1,561
I'm not disputing that the shots were actually taken at f/8, but the camera doesn't know WHAT f-stop is being used, so P-TTL doesn't work. As such, the built-in flash will always fire at full power. As you were fairly close to the objects, you got some overexposure. I think if you stopped down to f/11, the Pentax shots would have been exposed better.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
camera, k100, peepers, pentax, photo, pixel, sd14, time
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Sunpak Auto511 off-camera flash and bracket, Large Quantaray black camera bag pxpaulx Sold Items 3 02-11-2010 09:06 PM
dc.watch 2009 digital camera brands' poll & JCII historic camera award yakiniku Pentax News and Rumors 10 12-29-2009 09:05 PM
For Sale - Sold: Classic Excellent + Chrome ME Camera Body + Original Pentax Leatherette Camera yyyzzz Sold Items 8 11-08-2009 07:53 PM
Hi - from camera newby, Beta - Pentax Optio W60 waterproof camera review beta Welcomes and Introductions 2 03-24-2009 09:44 PM
How large have you printed from your 6mp camera? silverbullet Pentax DSLR Discussion 20 09-19-2007 10:44 AM



All times are GMT -7. The time now is 02:36 AM. | See also: NikonForums.com, CanonForums.com part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top