Sunday, November 18, 2007

Pinholio - Update # 4

Hai adik-adik!

Pinholio is a success... muahahahahahahahaha. It is true, one can produce a photographic image from nothing more than a few pieces of cardboard and a little pinhole.



Pinholio. f312/135mm

I went to Foto Pak Tai, whose owner was kind enough to help me process my negs immediately so i can figure out my exposure times.



The negatives hanging out to dry after processing, you can't see much cause the my handphone's camera sucks ass, but believe me, there is an image on that piece of negative... though i have to say it is slightly dense. Outdoors, on a sunny day, exposure time is 2 sec... when its overcast, about 4...

I tried to to take some indoor pics and got nothing but negatives that are completely blank. Tried one at 8 seconds and another fat 20 seconds... nada. Nothing came out. Then I went home and did some research. I am such an idiot, I totally forgot that when it comes to exposure times, you multiply 2 for every step... I heroically simply multiplied 4x for four steps... duh. hence 20 seconds... give and take... but in actual fact it really should be 30 seconds...

Then upon further research, I learned about 'reciprocity failure', which states that for exposures over 1 second... 'X' should be factored in to calculated exposure time due to the film's emulsions' something something...

Taking that into account, the correct exposure time should have been 2 minutes 34 seconds. Woohey. And then I did some more calculations and found out that a pinhole picture indoors can take anywhere between 50 seconds to 1 hour 20 mins or even more to expose... woohey...talk about patience.

Anyway, the photos from the test shoot will be available soon... Depending on whether I am rajin enough to fire up the darkroom.

1 comment:

Effa said...

too technical for meeeeeeeeeeee
i wonder how my photos turned out like...