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05-20-2010, 05:02 PM   #1
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ISO question

On my pentax Me it says I can have an ISO of 12. Where do I find film like this? The lowest I can find is 50. And what would ISO 12 be compared to in mega pixels?

05-20-2010, 05:10 PM   #2
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You can't convert ISO (sensitivity) to megapixels (resolution). ISO 12 on a DSLR would be...ISO 12!

AFAIK low-ISO films like that aren't really around much anymore, not that they were to begin with. They aren't all too useful, either, as ISO 12 would barely let you hand-hold anything.

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05-20-2010, 05:13 PM   #3
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QuoteOriginally posted by dawsonscholz Quote
On my pentax Me it says I can have an ISO of 12. Where do I find film like this? The lowest I can find is 50. And what would ISO 12 be compared to in mega pixels?
Ummmm...ISO vs. megapixels?

I think I will leave this one to the experts...


In regards to the first part of your inquiry, slow films in that range were available at one time, though the slowest I have ever personally shot was ISO/ASA 25. You can still get Adox CMS 20 at Freestyle, I think.


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05-20-2010, 05:25 PM   #4
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Yes as far as I know the Adox CMS 20 ISO is the slowest film you can buy.

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05-20-2010, 05:37 PM   #5
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I almost forgot...the old K-11 process Kodachrome was ASA 12...


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05-20-2010, 09:17 PM   #6
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QuoteOriginally posted by dawsonscholz Quote
On my pentax Me it says I can have an ISO of 12. Where do I find film like this?
The short answer is you can't. Not readily available anyway. You Might find something on ebay but it will be so old that it's likely unusable.

What you Can do with it however is put ASA25 film in the camera, and Tell the camera it's ASA12 to change the metering characteristic for exposure compensation. Unless you are processing your own film though, it would be rather pointless to do it.

05-20-2010, 09:31 PM   #7
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I've shot some efke IR820 film with an R72, IR filter at ISO 3.
05-21-2010, 12:54 AM   #8
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Rollei ATP TechPan replacement is EI20-32
Efke/Adox 25
Microfilm

05-21-2010, 07:59 AM   #9
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QuoteOriginally posted by tuco Quote
I've shot some efke IR820 film with an R72, IR filter at ISO 3.
How did that turn out? With the shots you've been posting I'm assuming pretty good.
05-21-2010, 09:07 AM   #10
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QuoteOriginally posted by EyeSpy Quote
How did that turn out? With the shots you've been posting I'm assuming pretty good.
The film is somewhat curly. Assessing the negatives requires more shooting (I've only shot two rolls so far) but they look okay. And with most IR films, its good to bracket but I didn't do any of that. When I get around to shooting it on a better camera, I'll have a better assessment.

This and the others were shot on a Holga. Most shots were 1 and more seconds on bulb since the camera only has one shutter speed. I was mostly curious and trying out the film. Here is an example:


Holga 120N Toy Camera, efke IR820 @ EI3, R72 filter, Rodinal 1+50 @ 11:00 min

05-25-2010, 11:28 AM   #11
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Tuco is a cool mad scientist
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