foma / arista edu ultra 100 reciprocity failure

[JefreyJacob]

first of all, i'm sorry if i've posted this inquiry here. i'm not sure where to post it.
another one, i've searched a lot about this through out the web but i'm kinda confused (too many different data's) so i wonder if i post this here i could get a clear response from pinhole users.

here it goes..,

anyone had tried fomapan 100 / arista edu ultra on 4x5 sheet film? just wondering how do you manage reciprocity failure when using pinhole camera. i've only shot 2 sheets of this film with my 4x5 pinhole on a sunny day, my exposure was atleast at 1-3 secs. the result was good enough the contact print i made was quite nice.

do you guys have any reciprocity chart for foma / arista that works for you? i've downloaded a few with different datas so i'm quite confused what to use. maybe someone here got reciprocity chart that works best for them and easy to understand for a newbie pinhole user like me.

thank you guys!

FG

[Tom Persinger]

I found a chart that was posted by F295 member murrayatuptowngallery over on APUG that looks fairly accurate. I recall when I used to use this film the reciprocity failure was amazing. Here's what he wrote. You could send him a message via the F295 message system too.

Foma 100 Classic
1 1.9
2 6.0
3 11.6
4 19
5 27
6 36
7 46
8 56
9 68
10 80
11 93
12 106
13 120
14 135
15 150
16 165
17 181
18 197
19 213
20 230
21 247
22 265
23 282
24 300
25 318
26 336
27 355
28 374
29 392
30 411
31 430
32 449
33 469
34 488
35 507

[renon]

I use the following values

0.5 s -> 0.5 s
1 s -> 1.3 s
1.5 s -> 2 s
2 s -> 3.5 s
3 s -> 6 s
4 s -> 9 s
6 s -> 14 s
8 s -> 23 s
12 s -> 37 s
16 s -> 1 m
24 s -> 1 m 35 s
32 s -> 2 m 30 s
46 s -> 4 m
1 m -> 6 m 30 s
1 m 30 -> 10 m 45 s
2 m -> 17 m 15 s
3 m -> 28 m
4 m -> 44 m
6 m -> 1 h 10 m
8 m -> 1 h 45 m
12 m -> 3 h
16 m -> 5 h
24 m -> 8 h

[JefreyJacob]

thanks guys! forgot this thread already.

@renon, where did you get that one? theres a lot of chart for foma and i'm quite confused which to use.

thanks tom for that list i think i had that already.

[seoirse]

Jefrey,

This is the one that I use:

http://consumptive.org/technical/Fom...ild_Effect.pdf

It's absolutely bang on, I find.

Regards,
George.

[JefreyJacob]

thank you guys!