Black & White Digitalis

**Peter Rockstroh** · 02-11-2021, 06:09 PM - **3 Likes**

Digitalis purpurea, Sumapaz National Park
HP5 @ ASA 250 in HC-110 N+1
Galerie FB G3 Selenium toed

Attached Images

tuco · 02-12-2021, 07:47 AM

Nice. Usually N+1 is under expose and over develop. Your resulting speed test to ISO 250 with HC 110 seems unusual.

**Peter Rockstroh** · 02-12-2021, 07:53 AM - **1 Like**

Thanks. Not necessarily. I exposed normally for the shadows and extended development to make the flowers stand out more against the dark background.
I also wanted to accentuate texture.

**Peter Rockstroh** · 02-12-2021, 08:55 AM

My personal exposure index is the setting at which I can produce predictable results with my camera/light meter combination.
The term box speed developer would imply that the equipment has no influence on your exposure index. I did my tests
precisely because there was a big difference from one camera/lens to another. I am attaching some film test results.
Agitation pattern is 5 sec every 30 sec. Just as a reference, my exposure index for HP5 on my Rolleiflex 3.5 is ASA 720

Attached Images

tuco · 02-12-2021, 09:04 AM

Okay, looks good. I do my speed test the Zone system way of placing Zone 1 at 0.10 density above base + fog. If it comes out to within 1/3 stop of box speed, I don't bother and just round to the nearest whole stop. I find it hard to develop consistently to a precision of 1/3-stop and with the latitude of BW film it's a wash. And my Pentax 67 only has full-stop shutter speeds and 1/2-stop apertures. I use the folding hood.

DBiancosino · 04-20-2021, 08:34 AM

This makes me want to see a macro shot as well.

**Peter Rockstroh** · 04-20-2021, 02:23 PM

Originally posted by DBiancosino

This makes me want to see a macro shot as well.

Here is a macro image

Attached Images

View Picture EXIF

Waffles · 04-20-2021, 04:32 PM

Oooh. The macro shot is exceptionally nice. Those tones pull ya in

**Peter Rockstroh** · 04-20-2021, 05:48 PM - **1 Like**

Yes, when you find a subject hat has rich textures and allows you to play with light and shadow,
macro in B&W is a lot of fun

wed7 · 04-20-2021, 07:06 PM

Wow! I am became a fan already. Where can I sub?

02-12-2021, 09:04 AM	#5
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,026	Okay, looks good. I do my speed test the Zone system way of placing Zone 1 at 0.10 density above base + fog. If it comes out to within 1/3 stop of box speed, I don't bother and just round to the nearest whole stop. I find it hard to develop consistently to a precision of 1/3-stop and with the latitude of BW film it's a wash. And my Pentax 67 only has full-stop shutter speeds and 1/2-stop apertures. I use the folding hood. Last edited by tuco; 02-12-2021 at 09:10 AM.

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02-12-2021, 07:47 AM	#2
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,026	Nice. Usually N+1 is under expose and over develop. Your resulting speed test to ISO 250 with HC 110 seems unusual.

02-12-2021, 07:53 AM - 1 Like	#3
Peter Rockstroh Admiral Join Date: Nov 2020 Location: Bogota Posts: 445 Original Poster	Thanks. Not necessarily. I exposed normally for the shadows and extended development to make the flowers stand out more against the dark background. I also wanted to accentuate texture.

02-12-2021, 08:55 AM	#4
Peter Rockstroh Admiral Join Date: Nov 2020 Location: Bogota Posts: 445 Original Poster	My personal exposure index is the setting at which I can produce predictable results with my camera/light meter combination. The term box speed developer would imply that the equipment has no influence on your exposure index. I did my tests precisely because there was a big difference from one camera/lens to another. I am attaching some film test results. Agitation pattern is 5 sec every 30 sec. Just as a reference, my exposure index for HP5 on my Rolleiflex 3.5 is ASA 720 Attached Images

04-20-2021, 08:34 AM	#6
DBiancosino Junior Member Join Date: Apr 2014 Posts: 46	This makes me want to see a macro shot as well.

04-20-2021, 04:32 PM	#8
Waffles Pentaxian Join Date: Jan 2021 Location: The Carolinas Posts: 461	Oooh. The macro shot is exceptionally nice. Those tones pull ya in

04-20-2021, 07:06 PM	#10
wed7 Pentaxian Join Date: Mar 2010 Location: Manila, Philippines Posts: 1,421	Wow! I am became a fan already. Where can I sub?