High ISO as an effect - example photos...

[paul_k1664875007]

<p>The D2X produces substantial grain when pushed over 400 ASA, especially when underexposed</p>

<p>Here's some examples, where the grain despite the small size of the picture is very visible, in particular with the b/w conversions</p>

<p>http://www.pbase.com/paul_k/scheef_20100928&page=2</p>

<p>http://www.pbase.com/paul_k/scheef_20100928&page=3</p>

<p>Problem that day was heavy fog, hence very little light, obviously hardly any contrast (kudos for the AF of the D2X!) and as you can see from the ' color ' pictures, all tricks had to be pulled out of the closet to get a somewhat acceptable picture. And of course, if everything fails, using the 'artistic' card always offers a good excuse to camouflage technical shortcomings (at least in my case).</p>

<p>I must admit though that I still have a D1H (only 2,7 Megapixel!) in the back of the closet with which I want to do some high ISO heavy grain experiments with.</p>

[luis_g]

<p>It is not counter-intuitive, but counter-convention. The quality of the noise matters a lot with this. I'm going to have to drag out my old D1x and check the noise again at the highest ISOs. Some of my Fuji P&S's at 12,800 ISO and 3 MP are righteously noisy. No need to underexpose.</p>

[Spearhead]

<p>Here's one...<br>

<img src="http://spirer.com/images/gc5.jpg" alt="" /><br>

<em>Galaxxy Chamber</em></p>

[phil_cuddy]

<p>Hi steve,an interesting task. here's my quick take. i would:-<br /> - set iso to hi 1<br /> - make sure in camera noise reduction is off<br /> - find a hign contrast scene<br />- under expose 3 stops, maybe more<br /> - when importing to your computer, make sure you do not us noise reduction<br /> - in post processing increase exposure by 3 stops<br /> you should have significant noise in those shadows, in particular colour noise. if you use lightroom, you can remove just the colour noise, leaving the luminance noise grain. here's an example with all noise left in:-<br /> <img src="http://static.photo.net/attachments/bboard/00Z/00ZNdR-401219584.jpg" alt="" /></p>

<p> </p><div></div>

[lex_jenkins]

<p>Noise from the Nikon D2H at 1600, converted to b&w, is somewhat reminiscent of Ilford Delta 3200 at 1600-3200 in Diafine or Rodinal. Delta 3200 has fluffy, soft "popcorn" grain.</p>

<p>To get a similar effect from the D2H, I'll typically use only the green channel, tho' sometimes the red channel looks better (the blue is too noisy). Occasionally I'll use a channel mixer and carefully tweak the RGB and CMYK channels to get the desired tonal separation in the monochrome conversion.</p>

<p>Getting a convincing effect that resembles film grain more than digital noise depends on subject tonality and other factors, including sharpening. The effect is better in midtones and shadows, less so in brighter areas where the D2H luminance noise looks more like digital noise than grain. Oversharpening tends to emphasize the digital noise look, so these conversions work best on photos than don't need additional sharpening.</p><div></div>

[studio460]

<p>This is a <em>really</em> interesting thread. Too bad these threads get buried by new ones, and often get forgotten, and subsequently, get very few new contribuitions as time goes on.</p>

[Tim_Lookingbill]

<p>The high rez of digital camera's mine being 6MP tends to hide noise even when shooting at ISO 3200 which is my Pentax K100D's highest.</p>

<p>Below is a 1/5th the size crop section of a CFL I shot under fluorescent light and cranked sharpening in ACR to 150 Amount (max) and 3 Radius (max). The sharpening is what brought out the grain look.</p><div></div>