Large format camera + Android = Any App?

[photo-orama]

Hi there

For large format cameras, is there any app (for Android-like phones) that allows to calculate exposure based on draw etc?

!

 

[Shadowleong]

A great app that many use is actually pocket light meter on the IOS. Meters accurate and can tap multiple spots

 

[photo-orama]

A great app that many use is actually pocket light meter on the IOS. Meters accurate and can tap multiple spots

Many thanks, I will look into that, though I am an Android fan (hopefully there is something equivalent).

I am after something like this: http://www.cookseytalbottgallery.com/bellows_compensation.php
I have found from Ken Rockwell (I know... !):

"'m cheap and good with math, so I calculated and drew my own scales. You can find the formulae in Ansel's Book "The Negative." You read from a different scale for each lens. I draw these on a ruler I lay on my focusing bed, and read the factors from my custom scales. "
http://www.kenrockwell.com/tech/exposure-large-format.htm

I do have "The Negative", (in my edition, pp 65) he mentions: Extension ^ 2 / Focal Length ^ 2 (with whatever other filter factors).. Quick and dirty look last night.. is that it?

 

[photo-orama]

Many thanks, I will look into that, though I am an Android fan (hopefully there is something equivalent).

I am after something like this: http://www.cookseytalbottgallery.com/bellows_compensation.php
I have found from Ken Rockwell (I know... !):

"'m cheap and good with math, so I calculated and drew my own scales. You can find the formulae in Ansel's Book "The Negative." You read from a different scale for each lens. I draw these on a ruler I lay on my focusing bed, and read the factors from my custom scales. "
http://www.kenrockwell.com/tech/exposure-large-format.htm

I do have "The Negative", (in my edition, pp 65) he mentions: Extension ^ 2 / Focal Length ^ 2 (with whatever other filter factors).. Quick and dirty look last night.. is that it?

Got it:

Bottom of: http://www.cookseytalbottgallery.com/photo_blog_article.php?blRecordNumber=24

> extension is bellows extension in mm
> focalLength is focal length in mm
> factor = (extension * extension)/(focalLength * focalLength)
> stopsCompensation = log(factor)/log(2)

 

[RubbishBin1987]

Hi there

For large format cameras, is there any app (for Android-like phones) that allows to calculate exposure based on draw etc?

!

Pardon me, but what are you shooting that will require the calculation? Anyway, the quickest and fastest way will be to use a "quickdisk". For camera like sinar, using a probe meters directly on your gg and no calculation required.

 

[MaedaKimiyama]

Pocket light meter is the way to go

 

[photo-orama]

Pocket light meter is the way to go

Hi there
I am using a Toyo View Cam. I am not measuring off the ground glass, so metering off a handheld meter like I did do when using medium format and the like would require compensation for the focusing draw?

e.g. http://www.hasselbladhistorical.eu/HT/HTComp.aspx#CalcProc
and of course: http://www.johndesq.com/formulas/formulas.htm

On a different note, is anyone selling a used change bag for loading 4x5 film and a camera view bag (preferably soft cases rather than hard cases).

 

[Shadowleong]

I usually only do bellows compensation IF I'm using a long lens at super close portrait distance or macro since these senarios would stretch the bellows. You don't really have to meter off the ground glass. In fct it would introduce more factors for errors depending on if you're using a Fresnel GG matt or etc type of glass. A hard and fast way would be to meter normally, look at the bellows draw(indicated on rail if using a view camera) add afew stops depending on calculation. If macros then you could use the disk method. Its all about preference

 

[RubbishBin1987]

I usually only do bellows compensation IF I'm using a long lens at super close portrait distance or macro since these senarios would stretch the bellows. You don't really have to meter off the ground glass. In fct it would introduce more factors for errors depending on if you're using a Fresnel GG matt or etc type of glass. A hard and fast way would be to meter normally, look at the bellows draw(indicated on rail if using a view camera) add afew stops depending on calculation. If macros then you could use the disk method. Its all about preference

A metering probe that works with a metering back will be the best choice for ppl with thirst for ultra accurate result and more time to spare when shooting.

http://photo.net/bboard/q-and-a-fetch-msg?topic_id=23&msg_id=000vhg