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04-23-2010, 08:55 AM   #1
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Is this noise excessive?

I was selling my FA 50 1.4 because I don't like the focal length and the buyer told me with a KX the noise was excessive and told me to take my camera into the shop.

I thought it was just soft, because he wanted un-pp'd jpgs from the camera wide open. Which tends to be soft, hence why I used the FA at 1.7 or 2.

If someone is bored could you PM me for my email and email me a sample jpg wide open, un-pp'd. If there is something wrong with my camera I'd like to know...

My mind is open, bad lens, camera, unreasonable expectations... whichever...

I have attached some lens porn for those of you who are into that kind of thing

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04-23-2010, 08:59 AM   #2
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Sample

I was thinking it could be a little front focused so I was testing that last night... here is a parred down sample...

KX 1600 50mm f1.4 1/60
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04-23-2010, 12:13 PM   #3
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Where's the noise?

I honestly don't see any, which kind of makes me want the K-x even more. I think he was just trying to con you into doing something, because the more I look at these the more I can't see anything wrong with them, just more things that are right with them.
04-23-2010, 01:44 PM   #4
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I agree, I really don't see much noise at all in these shots. I am really surprised that this was shot with the K-x at ISO 1600 as it is really impressive and I sure wish my K20D could pull this off. Maybe try posting a bigger shot so I can see the darker areas better.

04-23-2010, 01:56 PM   #5
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The K20D does reasonably well at ISO 1600, as long as exposure is adequate.
But as with others, this example looks acceptable to me at this magnification.
Perhaps the 100% crop makes the noise obvious to you, but at that ISO you'll have to expect some noise, no matter the camera.

As for the FA 50, it's a great lens - perhaps not my best, but my fastest. I've not sold mine despite having the 31 and 77 simply because I've had stellar results come from this lens even at f/1.4

I've posted my examples in an earlier thread of a similar vain: https://www.pentaxforums.com/forums/pentax-slr-lens-discussion/96880-rather-u...m-1-4-a-2.html
04-23-2010, 02:03 PM   #6
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QuoteOriginally posted by jct us101 Quote
Where's the noise?


...snip....
+1 to that one.
What noise are we talking about? At the sizes of the shots provided I can't see nearly any...
It still doesn't make me want to buy K-x but I'd sure like to stick that sensor into K10/20 type body and then buy that camera
04-23-2010, 02:04 PM   #7
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Thanks for the samples...


Like there is noise on this image, but it is a very tight crop at 12800 / 1.4.

No PP
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04-23-2010, 02:10 PM   #8
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I think, one tends to see more noise in images with low DOF, it is just the sharpest thing on the unsharp portions. I guess that's how the brain works.

04-23-2010, 02:28 PM   #9
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Those images look fine to me. At 12800, you're going to see quite a bit of noise. I have this lens (as well as a Kx), and mine is very sharp. Yes, it's a bit soft at F1.4, but that's to be expected.
04-23-2010, 02:37 PM   #10
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QuoteOriginally posted by icywarm Quote
Thanks for the samples...


Like there is noise on this image, but it is a very tight crop at 12800 / 1.4.

No PP
geeeeeeeeeeez, so much noise

seriously? K10 can look worse on ISO 1250...

I'd be more than happy with that.. what do you expect from ISO12800?!?
04-23-2010, 02:44 PM   #11
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QuoteOriginally posted by axl Quote
what do you expect from ISO12800?!?
Oh I know, I was just pointing out that I think I know what noise is... ok, thanks guys, I didn't think I was crazy, but sometimes it doesn't hurt to check...
04-23-2010, 02:48 PM   #12
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QuoteOriginally posted by icywarm Quote
Thanks for the samples...
Like there is noise on this image, but it is a very tight crop at 12800 / 1.4.

No PP
My K-x looks about the same at 128,000 - and frankly at 128,000 my K-x looks miles better than my K10 did at 1600, or even 800 if the shot had much contrast :P

Two of mine at 128

Tamron 500mm 55B mirror lens with 2x TC on, 1/320s

Tamron 500 again, 1/200s
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