Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-22-2010, 06:40 AM   #1
Site Supporter
GeneV's Avatar

Join Date: Oct 2008
Location: Albuquerque NM
Photos: Albums
Posts: 9,761
Rodinal, Compensating and Filters

Over in the "show us your film shots" thread, I posted some shots I took Saturday of blossoms after a snow. The shots were taken on LegacyPro100 (reputed to be Fuji Acros) medium yellow filter, exposed at ISO 100 with a +.5 stop filter factor (1/2 the usual compensation for Med yellow) and developed in dilute (1:80) R09 for just under 17 minutes at 21 degrees C with minimal agitation. I have just started using this development technique based upon results I saw from others, here. My thought was that it would help to render the subtle differences in highlights between the snow and the blossoms.

However, what I noticed is that 1) the negatives have a fairly high density and low contrast and 2) the effect of filters is blunted. The end effect is an interesting, delicate shot, but not the shot I expected.

Below are three examples from that day. The first is one I previously posted shot on LegacyPro100, but darkened a bit so that the stems come closer to matching the shots that follow in tone. The second is a color shot from a pocket camera I had with me on ISO 200 print film, and the third is the color shot rendered to BW in Photoshop with a "yellow filter." The third shot is closer to what I thought I was getting in sky tone.

The last shot (nothing special as a photo) is another roll of LegacyPro that I processed at the same time. It was shot on a different day with a medium RED filter, with half the usual filter factor for red, so, theoretically underexposed. The tones on the playground equipment are pretty close. Note that the sky is better rendered than the blossoms, but nothing like what I expect from a red filter.

So, when using this development technique should I seriously underexpose? Is Fuji Acros so sensitive to blue that filters don't have their expected effect? Other thoughts?









03-22-2010, 09:22 AM   #2
Veteran Member




Join Date: Feb 2009
Location: Norfolk, UK
Posts: 545
I've never used Acros but I do use Rodinal with APX100 and I know that stand or semi-stand techniques where there isn't much agitation will result in low contrast negs. I use contrast filters in my enlarger to increase the contrast if needed. I suppose you can just do the same to your scans in photoshop.
03-22-2010, 10:01 AM   #3
Site Supporter
GeneV's Avatar

Join Date: Oct 2008
Location: Albuquerque NM
Photos: Albums
Posts: 9,761
Original Poster
QuoteOriginally posted by Vendee Quote
I've never used Acros but I do use Rodinal with APX100 and I know that stand or semi-stand techniques where there isn't much agitation will result in low contrast negs. I use contrast filters in my enlarger to increase the contrast if needed. I suppose you can just do the same to your scans in photoshop.
That is quite true. My scans are juiced up quite a bit in Photoshop to get the contrast shown. Unfortunately, it does not seem to deepen the sky. That is what I found curious. The shot of the girls on the playground has reasonable contrast for the girls and the equipment, but the sky is nothing like one expects from a red filter.

Last edited by GeneV; 03-22-2010 at 02:42 PM.
03-22-2010, 10:33 AM   #4
Pentaxian
Ratmagiclady's Avatar

Join Date: Nov 2008
Location: GA
Photos: Gallery | Albums
Posts: 13,464
Well, I can tell you from experience that Acros is just *tough* in snow. It's very impressive at a lot of what it does, but delicate renderings of snow just isn't one of those things. I like a dense negative, but I think it may be just 'too much' in some ways. At least, I never found the right developer (Only tried the usual suspects when I was up in the snowy North: D-76 and the T-max developer (yikes. That wasn't a great idea) but it makes the usual stuff I do want to really block everything up.

I never got to it, but the next thing I'd be inclined would be to expose kind of like Kodachrome and do nothing for my usual preference for shadow detail. Or, if I were home, walk into my favorite pro lab and see what they gave me. I've kind of labeled it 'High tech, usual rules not applicable,' for now. I may have been getting a hair overexposure thanks to a lens on my Mamiya whose aperture blades may have been sluggish, but it's clearly not very forgiving in the highlights in this respect.

So, if that's Acros, in fact, I'm guessing, do it by the numbers.

03-22-2010, 02:32 PM   #5
Site Supporter
GeneV's Avatar

Join Date: Oct 2008
Location: Albuquerque NM
Photos: Albums
Posts: 9,761
Original Poster
QuoteOriginally posted by tuco Quote
Wouldn't that be theoretically overexposed? If you're suppose to, say, apply 3 stops for a Red filter and you only applied 2 stops, I think you'd have more exposure.
I applied one stop to compensate for the filter, so it is theoretically at least one stop under the recommended exposure for a red filter but one stop more than that indicated by the meter. I guess one would have to define "underexposed" and "overexposed." The exposure is less than recommended.

To better phrase the question, should I not apply a filter factor with Acros? Should I underexpose (push) Acros when using the semi-stand development?

Last edited by GeneV; 03-22-2010 at 02:38 PM.
03-22-2010, 02:36 PM   #6
Site Supporter
GeneV's Avatar

Join Date: Oct 2008
Location: Albuquerque NM
Photos: Albums
Posts: 9,761
Original Poster
QuoteOriginally posted by Ratmagiclady Quote
Well, I can tell you from experience that Acros is just *tough* in snow. It's very impressive at a lot of what it does, but delicate renderings of snow just isn't one of those things. I like a dense negative, but I think it may be just 'too much' in some ways. At least, I never found the right developer (Only tried the usual suspects when I was up in the snowy North: D-76 and the T-max developer (yikes. That wasn't a great idea) but it makes the usual stuff I do want to really block everything up.

I never got to it, but the next thing I'd be inclined would be to expose kind of like Kodachrome and do nothing for my usual preference for shadow detail. Or, if I were home, walk into my favorite pro lab and see what they gave me. I've kind of labeled it 'High tech, usual rules not applicable,' for now. I may have been getting a hair overexposure thanks to a lens on my Mamiya whose aperture blades may have been sluggish, but it's clearly not very forgiving in the highlights in this respect.

So, if that's Acros, in fact, I'm guessing, do it by the numbers.
Normally in snow, I would add a stop or two, and normally I would add a stop or two for the filter, so theoretically, I should have been adding several stops. I added one stop on the park and .5 stops on the snow. So, you are suggesting I not make adjustments at all?

By the way, it is not the snow that bothers me so much as the sky. The tone of the sky between those branches should be something like that shown on the color shots.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
blossoms, color, day, effect, filter, filters, shot, shots, sky, third
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
For Sale - Sold: Trade: My 77mm filters for your 72mm filters (CONUS) loveisageless Sold Items 0 10-02-2010 12:29 AM
To use UV filters or Not to use UV filters?HELP NEEDED Softsoap Pentax SLR Lens Discussion 6 02-20-2010 04:50 PM
compensating for crop factor jeans Pentax DSLR Discussion 52 01-28-2010 03:03 PM
DA15 compensating for lack of versatility Pentaxor Pentax SLR Lens Discussion 25 10-25-2009 09:36 AM



All times are GMT -7. The time now is 11:42 PM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top