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09-29-2009, 09:50 AM   #211
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maconmatt, that's fantastic

10-01-2009, 05:44 PM   #212
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Thanks! It was my first time using my Super-tak in a real-world, low light setting. I wasn't sure how manual focus was going to go...but it wasn't bad at all!
10-05-2009, 05:21 AM   #213
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This is fantastic!

really film like

QuoteOriginally posted by cabstar Quote
Exposure: 0.003 sec (1/320)
Aperture: f/2.8
Focal Length: 65 mm
Exposure: +1.71
ISO Speed: 1600
Exposure Bias: 0 EV
Flash: Off, Did not fire

Pushed by nearly 2 stops in PP

10-05-2009, 09:35 AM   #214
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This image is admittedly kind of a fluke, because it resulted from user error. Normally, if I underexpose an image two stops at ISO 1600 and push process for the equivalent of ISO 6400, it's because the light is so terrible I have no choice, and the results reflect this - flat, murky, and generally unpleasant even aside from noise. But the other night, I simply screwed up - I had just stopped down from f/2.4 to f/3.5 and meant to *slow* the shutter speed a stop to match (in M mode), but absent-mindedly *sped it up* instead. As a result I was two stops underexposed and had to push process the image accordingly. This was a scene that I *could* have easily shot without any of that; the lighting was actually decent by jazz club standards. The results are much better than one might expect for the equivalent of ISO 6400 on the K200D. This serves as an excellent demosntration of my oft-repeated observation that the appearance of noise is very dependent on a number of factors such as the nature of the scene, lighting, and exposure, making comparison between cameras pointless unless you controlling all of those factors.

Here's the image that resulted, using just a bit more luminance NR in ACDSee Pro 3 than I might ordinarily apply for ISO 1600:



Here's a link to a somewhat larger version:

http://marcsabatella.zenfolio.com/img/v8/p367570525.jpg

10-05-2009, 11:04 PM   #215
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I had been shooting concerts with my k10d that when I got my k20d I didn't know how to act. I started at 6400 thinking that would be necessary, but halfway through I changed to 3200. The I noticed i was shooting such a fast shutter that I threw on the 70-300 zoom and kept shooting. Amazing!


Camera: Pentax K20D
Exposure: 0.008 sec (1/125)
Aperture: f/5.6
Focal Length: 200 mm
ISO Speed: 3200
Exposure Bias: 0 EV
Flash: Off, Did not fire
Image Width: 914
Image Height: 1024
Exposure Program: Program AE
Date and Time (Original): 2009:09:30 22:47:40
Date and Time (Digitized): 2009:09:30 22:47:40
Metering Mode: Spot
Color Space: Uncalibrated
Sensing Method: One-chip color area
Custom Rendered: Normal
Exposure Mode: Auto
White Balance: Auto
Focal Length In35mm Format: 300 mm
Scene Capture Type: Standard
Contrast: High
Saturation: Normal
Sharpness: Hard
Subject Distance Range: Distant

This is an earlier image, closer up at 6400



Camera: Pentax K20D
Exposure: 0.008 sec (1/125)
Aperture: f/8.0
Focal Length: 55 mm
ISO Speed: 6400
Exposure Bias: +1/2 EV
Flash: Off, Did not fire
Image Width: 778
Image Height: 1024
Exposure Program: Program AE
Date and Time (Original): 2009:09:30 21:27:02
Date and Time (Digitized): 2009:09:30 21:27:02
Metering Mode: Spot
Color Space: Uncalibrated
Sensing Method: One-chip color area
Custom Rendered: Normal
Exposure Mode: Manual
White Balance: Auto
Focal Length In35mm Format: 82 mm
Scene Capture Type: Standard
Contrast: High
Saturation: Normal
Sharpness: Hard
Subject Distance Range: Close
10-06-2009, 09:37 AM   #216
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K20D
FA31
F 2.0
ISO 3200

i know its over exposed... but i ended up liking the feel of it..

also i stumbled on a funky custom white balance that i really really like

10-07-2009, 09:20 AM   #217
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Okay, what a great test for a camera's IQ @ high ISO than an aquarium? Not only is the light indoors dim, but within the individual tanks light is even dimmer. Not only that, but some of the tanks have glass a couple of feet thick through which we must shoot. Also, smeared finger prints cover the glass as kids try to touch their favorite sea creatures. Here are a few I got @ the New England Aquarium:


1st 0ne 800 ISO Jellyfish
2nd One 1250 ISO Fish
3rd One 1600 ISO Giant Green Sea turtle
4th One 2500 ISO Giant Pacific Octopus
5th One 3200 ISO Starfish
Attached Images
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PENTAX K20D  Photo   
View Picture EXIF
PENTAX K20D  Photo 
View Picture EXIF
PENTAX K20D  Photo 
View Picture EXIF
PENTAX K20D  Photo 
10-07-2009, 09:53 AM   #218
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QuoteOriginally posted by Jewelltrail Quote
Okay, what a great test for a camera's IQ @ high ISO than an aquarium? Not only is the light indoors dim, but within the individual tanks light is even dimmer. Not only that, but some of the tanks have glass a couple of feet thick through which we must shoot. Also, smeared finger prints cover the glass as kids try to touch their favorite sea creatures. Here are a few I got @ the New England Aquarium:


1st 0ne 800 ISO Jellyfish
2nd One 1250 ISO Fish
3rd One 1600 ISO Giant Green Sea turtle
4th One 2500 ISO Giant Pacific Octopus
5th One 3200 ISO Starfish
wow!

10-08-2009, 10:51 AM   #219
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QuoteOriginally posted by GregV Quote
...
This is an earlier image, closer up at 6400


Stunning - I absolutely love this one !!
10-08-2009, 02:03 PM   #220
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There's something to be said for lower pixel count as in the 6Mp K100D -
I find ISO1600 more than acceptable -
ISO3200 is pushing it a bit - but for web usage it's still OK.

ISO1600 can be really good -

I have re-attached the metadata (EXIF + Pentax notes) to these resized/processed images using PhotoME .


left: lens equiv. 207 mm; f/4.5; 1/125 sec; ISO1600
right: lens equiv. 270 mm; f/5.6; 1/50sec; ISO1600


left: lens equiv. 187 mm; f/4.5; 1/50sec; ISO1600
right: lens equiv. 240 mm; f/5.6; 1/40 sec; ISO1600

With good (colorful) lighting ISO3200 can look great -

Both below were at ISO3200 - again I have re-attached the EXIF with PhotoME.


Focal Length: 31.0mm (35mm equivalent: 46mm)
Exposure Time: 0.017 s (1/60)
Aperture: f/4.0
ISO equiv: 3200


Focal Length: 63.0mm (35mm equivalent: 94mm)
Exposure Time: 0.013 s (1/80)
Aperture: f/4.5
ISO equiv: 3200
10-13-2009, 09:50 AM   #221
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Shot through feet of glass. ISO 800
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10-14-2009, 10:00 AM   #222
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1/30th--f 4.5--ISO 1250 The brown blur behind this cow is her spring calf. I was sure to stay on the side opposite to the calf. In the woods, at dusk, it sure was great to still be able to get a decent shot of her.
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10-14-2009, 01:49 PM   #223
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Here's another shot from the K200D taken over stop underexposed at ISO 1600 and pushed 1.25 stops, for the equivalent of somewhere around ISO 3800. Processed in ACDSee Pro 3 with chroma NR at max, and just a tiny bit of luminance NR (my standard "high ISO" preset):


Last edited by Marc Sabatella; 10-14-2009 at 01:57 PM.
10-14-2009, 06:35 PM   #224
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Dresden Break

K2000
DA 40 F2.8 Limited
F2.8
1/45s
1600 ISO

+0.5 Exposure, NR, and other tweaks in LR

10-14-2009, 11:02 PM   #225
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K20D, Tamron 28-75F/2.8 ISO 3200
APPX 50% CROPS.




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