bellows factor app

[mamanton]

Hi everybody! We have an app. Totally free!

[Roman Zemlyachev]

Free App for Bellows Extension (Factor) - Art of Foto

Apple - https://itunes.apple.com/us/app/art-...l=ru&ls=1&mt=8

Google - https://play.google.com/store/apps/d...mobi.artoffoto

[Mark Sawyer]

Okay, one more time...

"f/stop".

"f" is the "focal length".

"/" is over, as in "divided by".

"stop" is the diameter of the aperture that stops light.

"f over stop" = Focal length divided by the diameter of the stop.

It's a fraction. That's it. A fraction.

One number over another number. A fraction. A freakin' fraction.

If you need an app to explain basic third grade math for you, you're already in over your head. You won't really understand what the answer means anyways...

Duh...

(Yeah, I'm being grumpy again... )

[Sfroza]

5/3 of Americans don't understand fractions.


Michael

[Tin Can]

Got the app to back up my sewing tape measure.

Thanks Ken and mamanton!

I can do freactions now, but soon or later maybe not...

[Drew Bedo]

Um. . .yeah. Just pre-figure the per-inch correction for your most used lenses or the metric equivilant. Do the math once.

When shooting in the field with the creative juices flowing and the wind blowing, you can get it done on the fly and leave the smart phone safely stowed away.


When shooting something critical (as in bridal portraits for money)I n the studio, go ahead and work it out to the 1/10 of a stop (sorry about using a fraction).

[robertraymer]

All discussion over best method/personal preference/whether or not an app should be needed aside.....the the app Photo Buddy has a bellows extension calculator in it. I believe it is free but could be wrong. I have had the app on iPhone for a long time, and use it mostly for its other features, but it is there. Download it and try it if you like.

[Jim Michael]

Just use f-stop inches. For an 8 inch lens (“f8”) open 1 stop at 11” (“f11”) and 2 stops at 16” (“f16”). Substitute f-stop cm as needed.

[Duolab123]

I carry a nice compact 8' tape measure and the little Kodak guides with all the little dial computers.

[Drew Bedo]

It all comes down to whatever works best for each individual photographer.

I got into Large Format in parallel with entering a career working in Nuclear Medicine in the late 1980s. Nuc-Med involves imaging patients with isotope tracers and sophisticated computer driven equipment much like (but different from) CT and MRI imaging. At that time, the technology had not yet gone fully digital and we were using 8x10 B&W film in standard 8x10 LF film holders.

I picked up a beaten but functional pre-anniversary Speed Graphic and cut down some film to start off. Then got a Kodak 2D in 8x10. I'd load up a couple of film holders on Friday and process the sheets in the clinic's automatic processor on Monday. I found that these two imaging modalities (LF film and Nuc-Med) were complimentary. My daily work was technology -intense and LF was low-tech but high-touch. I was attracted to the physical manipulation of the camera and other gear along with figuring out the variables that go into making an effective exposure.

Perhaps that is what is behind my aversion to using an APP on a device to create and capture an image. Thats just me.

If others need a device to facilitate their work flow and creative process then that is what works for them.

The only thing that really matters is getting out and shooting.