k7 noise


belgarion11

Link Posted 24/10/2012 - 17:26
I have just bought a second hand K7 and i am shocked about the amount of noise at low iso speeds. I have the noise reduction turned on but to now availe. My old km had no such problem. can anyone help ?

johnriley

Link Posted 24/10/2012 - 17:40
Perhaps you could show us an example?
Best regards, John

McGregNi

Link Posted 24/10/2012 - 18:06
I have a K7 and I'm aware that's its certainly not first choice for shooting at high ISOs, but I have always understood its low iso performance to be absolutely fine.

Just some extra info would be helpful :

What iso setting are you referring to specifically.

Is the noise the grain type, or colour patchy type (blue or yellow)

Is it confined to the darkest shadow areas, or in a fuller range of brightness ares?

Are you looking at a JPEG or RAW from the camera?
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

bettyswolloks

Link Posted 24/10/2012 - 19:29
belgarion11 wrote:
I have just bought a second hand K7 and i am shocked about the amount of noise at low iso speeds. I have the noise reduction turned on but to now availe. My old km had no such problem. can anyone help ?

I had a similar reaction when I went from a K10 to K7. I still find it noisey. Shooting raw helps. But I'd say you'll get used to it. I have and love it to bits now

stub

Link Posted 24/10/2012 - 20:43
Got to say I also find the K7 to be useless above iso 800. But I would not swap it for anything else. I love it.
K-1Gripped K-1 ungripped K-5ii K7 Various lenses

Stuart..

nass

Link Posted 24/10/2012 - 22:54
I love it but not as much as my K5. I gives me noise issues in darks.
... just another middle-aged guy with a hobby. I have an extreme macro learning site at extreme-macro.co.uk - Pentax-centric, your feedback and comments would be appreciated!

DrOrloff

Link Posted 24/10/2012 - 22:58
I had a K7 as a replacement for a faulty K20. I thought the noise levels were awful, upgraded to a K5.
You can see some of my photos here if you are so inclined

Pentaxophile

Link Posted 24/10/2012 - 22:59
I went from a K200D to a K7. I didn't really notice it being noisier at base ISO- I was more impressed with how much better it was at high ISO: usable ISO1600 - wow! (Seems rather quaint now!)

The low ISO images (ISO400 and lower) do, however, have a bit more grain to them. You can either eradicate this in LR3 or similar, or just accept that this sort of noise has no impact on prints or web sized images. If you're not happy, send it back or sell it on - or get some professional quality ISO100 negative film scanned and pixel peep it for a bit of a 'reality check!'
[link=https://500px.com/will_brealey/[/link]
Last Edited by Pentaxophile on 24/10/2012 - 23:02

DaveHolmes

Link Posted 25/10/2012 - 00:36
This thread from the 'other forum' might be worth a read (tbh... from start to finish)
http://www.pentaxforums.com/forums/pentax-dslr-discussion/106600-k-7-high-iso-su...
........................................................................
Digital:
Pentax K5- Vivitar 19mm 3.8; FA35mm f2; D-Xenon 100mm macro f2.8; DA50-200mm WR...
Flash:
Yongnuo YN-560; Vivitar 285HV; Cactus V4 triggers...
Film:
Pentax-MX & M50mm f1.4; Spottie & 55mm f1.8; MG & M40mm 2.8...

http://www.flickr.com/photos/daveholmesphotos/

belgarion11

Link Posted 25/10/2012 - 04:02
Thanks for the comments guys. The iso im using is 200 and the noise is the grainy type. Its a bit disapointing but i can live with it i suppose.

McGregNi

Link Posted 25/10/2012 - 14:42
I've not seen anything which I considered a problem at iso 200, not under reasonable lighting conditions at least. If you posted up a shot or 3 of what you are seeing we might be able to comment on if this is as expected or if there is an obvious issue with your camera or the settings etc.
My Guides to the Pentax Digital Camera Flash Lighting System : Download here from the PentaxForums Homepage Article .... link
Pentax K7 with BG-4 Grip / Samyang 14mm f2.8 ED AS IF UMC / DA18-55mm f3.5-5.6 AL WR / SMC A28mm f2.8 / D FA 28-105mm / SMC F35-70 f3.5-4.5 / SMC A50mm f1.7 / Tamron AF70-300mm f4-5.6 Di LD macro / SMC M75-150mm f4.0 / Tamron Adaptall (CT-135) 135mm f2.8 / Asahi Takumar-A 2X tele-converter / Pentax AF-540FGZ (I & II) Flashes / Cactus RF60/X Flashes & V6/V6II Transceiver

MattMatic

Link Posted 25/10/2012 - 14:46

I didn't have a problem with the K7 - even shooting at ISO3200 on occasion.
Yes, the K5 is better still, but I certainly noticed a difference from the K20D etc.

An example would go a very long way to identifying what's happening - and whether what you are seeing is what we're assuming

Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)

bettyswolloks

Link Posted 25/10/2012 - 16:52
Have a look at your high iso noise reduction settings in the menu. They start at 18. Mine are 18-on 19-1 medium 20-1 800. Dunno if there the best or not though.
APs thoughts on K7 noise
Last Edited by bettyswolloks on 25/10/2012 - 16:54

SteveEveritt

Link Posted 25/10/2012 - 18:47
The K-20/K-7 had the first of the "new" CMOS sensors as the market turned its back on CCD.
I was at first was disappointed with the noise levels on my K-7, but you learn to overcome it first by adjusting the camera to try to use the lowest ISO you can, I always start with 100 and work my way up from there.
When shooting karts at the local track I use the wonderful TAV mode and let the camera decide the ISO I need for the shot, if you take your shots with -1 exposure compensation you can get away with faster shutter speeds and lower ISO but your pictures can be a tad dark but that can be fixed in software like Lightroom which also has some excellent noise suppression capabilities.

Oh, I forgot, quality glass will also make a difference. The "faster" the glass the lower you can keep your ISO.
My Flickr link

"Life is what happens to you while you're busy making other plans" (John Lennon)
Last Edited by SteveEveritt on 25/10/2012 - 18:49

JohnX

Link Posted 25/10/2012 - 19:10
Can't say I've ever seen noise at 200 ISO on my K20D.
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