How can test 4x5film without stepwedge?

Film Photography & Darkroom discussion

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Naithor
Posts: 2
Joined: Wed Mar 11, 2009 1:34 pm

How can test 4x5film without stepwedge?

Postby Naithor » Wed Mar 11, 2009 1:39 pm

ThankX :roll:


pentaxpete
Posts: 86
Joined: Thu Jan 12, 2006 7:19 am
Location: BRENTWOOD,Essex,(UK)

Postby pentaxpete » Wed Mar 11, 2009 2:53 pm

you don't say WHAT film it is: B/W, Colour Neg or Pos: when I was a Part-time Tutor at Barking College Photography dept. the students had Cambo,De Vere and an MPP 4x5 to use. The students had to make a 'step-wedge' exposure on one sheet of film and develop it first - but you don't want to do that; well, if it is B/W and the film is FRESH then you must make allowance for any 'Bellows Extension' if you are taking anything fairly close-up,then downrate the film and give less than recommended development for subjects with a high subject-brightness range, such as taken in strong sunlight or uprate slightly and give extended development for subjects with a low subject-brightness range such as in very overcast daylight. If the film is OUTDATED then you should give at least one stop MORE exposure and extend development by at least 25% from recommended times. You should get a first time result following this!
Got COMPUTERISED and 'slightly Digitised Pentax K10D' but FILM STILL RULES !

Naithor
Posts: 2
Joined: Wed Mar 11, 2009 1:34 pm

Postby Naithor » Mon Mar 23, 2009 11:21 am

Thank you pentaxpete yes I try to determine speed of 4x5BW sheet film

:lol:


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