View Full Version : More from my homemade 400mm

09-19-2007, 08:57 AM
A few more from the home made 400mm.

FYI, still haven't borrowed a digi-cam to make pictures of just the lens. Sorry.

First one, scanned then inverted to see the positive. Cropped some because I couldn't rack the Seneca far enough to fill the ground glass so I had to be back a little further than I really wanted. The crop cuts off where you would have seen beyond the backdrop. Attached files http://f295.f295.org/uploads/totem_001_crop_small_5637.jpg (http://f295.f295.org/uploads/totem_001_crop_small_5637.jpg)

09-19-2007, 08:58 AM
This one is a much longer exposure and I like it better as a negative. Looks creepy!

Also reminded me that while I inverted the first, I forgot to mirror it. Oh well.

Attached files http://f295.f295.org/uploads/totem_003_crop_small_4090.jpg (http://f295.f295.org/uploads/totem_003_crop_small_4090.jpg)

09-19-2007, 12:26 PM
RW, these are both nice images, I especially like the 2nd.

I was contemplating just yesterday what it is that I like about the images from these 'primitive' improvised optics, especially operating rather wide open. I think that they offer just the opposite kind of effect from pinhole. While pinhole offers almost infinite depth of focus, with little or no ability to isolate objects by focus effects, these wide-open, simple lenses can really isolate an object from its background and surroundings like crazy.

In fact, it rather reminds me of human vision, where the 'sharply' defined, central area (rods or cones, I can't recall) focusses our attention on details, while the periphery gives a general sense of motion, with little detail.

A book I read recently ("Art & physics : parallel visions in space, time, and light" by Leonard Shlain, ISBN:0688123058) went on to theorize that the (evolutionary) development of vision in this manner helped to differentiate the human brain into the left and right hemispheres, where one is more analytical and detail oriented, and the other is more holistic and emotional oriented.

There was also an interesting discussion (http://www.apug.org/forums/forum44/41494-blog-discussion-about-elusive-swirly-bokeh.html) over on APUG a while back about 'swirly bokeh' and how these simple lenses can produce an out of focus effect that looks like it's swirling, in motion.

I look forward to seeing more of your work with this new tool in your arsenal. Well done.


09-19-2007, 09:52 PM
Excellent work, RW!

I also like the 2nd.

09-20-2007, 05:03 AM
I didn't realize #2 was negative until you stated it. I did marvel at the difference between the two (a little slow, huh?) I do like the way it appears on the black background

09-20-2007, 05:06 AM
good Work, it's very intresting soft focus, very smoot and pleasure.


09-25-2007, 11:56 PM
Not a technically dazzling subject, but...

I wanted to test the package of Freestyle APHS 8x10 litho film I got. Turns out that Rodinal at 1:200 did a pretty good job. And guessing the ISO at 3 seems a good starting point. But I do need to test that to be a bit more accurate on exposures. And I think Jim Galli was right that the developer needs a little bit of restrainer to keep the highlights from blowing.

On the other hand,it worked ! (And used the 400mm singlet again)

Attached files http://f295.f295.org/uploads/litho_001_5664.jpg (http://f295.f295.org/uploads/litho_001_5664.jpg)

09-26-2007, 09:10 AM
Wow! RW, I like this last image; granted, it's not 'technically dazzling', as you said, but it's an interesting example of how these narrow DOF lenses can isolate objects in what would otherwise be perhaps just a mundane image of a desktop.

I'm interested in APHS film, and am glad that your 1:200 experiment worked out. What was your development time at that dilution?

BTW, I've shot APHS in daylight scenics, and also meter it at EI=3.

What does Jim Galli recommend as a restrainer?


09-26-2007, 11:07 AM
The two best threads I have found on using APHS are:

APUG : http://www.apug.org/forums/forum37/41588-freestyle-aphs-ortho-litho-film-what-iso.html

and Jim's pages : http://tonopahpictures.0catch.com/FreestyleAPHS/DevelopingAPHSwRodinal.html

Jim's formula is:
5cc Rodinal
20cc .2% Benzotriazole
4cc .1% Potassium Iodide
1000cc H2O

I took his suggestion to watch for image formation, note the time then multiply by 4.

This neg is a bit thin for my taste and there is some "scum" on the non-emulsion side. The scum could either be anti-halation coating that didn't wash or left-overs from the final rinse, maybe both. To be honest, I don't know which as I was in too much in "playtime" mode when I did this.