If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below. |
|
|
Thread Tools | Display Modes |
#1
|
|||
|
|||
Overexposuring analog film?
On 28/05/2012 5:59 PM, Sandman wrote:
The lab that developed my film gave me a tip on analog shooting. He said that I should overexpose my shots by setting the camera ISO setting to a step lower than than actual film. So my T-Max 400 film should be set to ISO 200, and my Portra 160 should be set to ISO 80. Looking at my pics, some are underexposed (which in most cases actually makes them look quite interesting). Do you guys have any comments on this? Its to compensate for them under processing your film. Most labs use a replenishment system to "top up" there chemicals to the correct concentration which keeps them "fresh". Usually labs just go merrily along and seldom check the developer with a test strip during the normal days production. Its only the startup period when its checked and the film density measured. So if your film is developed in the afternoon the strength could be under which will under develop the film. Just as a check compare the edge strip of the film which has been correctly exposed for a reference as to the correct development. |
#2
|
|||
|
|||
Overexposuring analog film?
Sandman wrote in news:mr-B2EDBA.12300028052012
@News.Individual.NET: In article , Rob wrote: On 28/05/2012 5:59 PM, Sandman wrote: The lab that developed my film gave me a tip on analog shooting. He said that I should overexpose my shots by setting the camera ISO setting to a step lower than than actual film. So my T-Max 400 film should be set to ISO 200, and my Portra 160 should be set to ISO 80. Looking at my pics, some are underexposed (which in most cases actually makes them look quite interesting). Do you guys have any comments on this? Its to compensate for them under processing your film. Most labs use a replenishment system to "top up" there chemicals to the correct concentration which keeps them "fresh". Usually labs just go merrily along and seldom check the developer with a test strip during the normal days production. Its only the startup period when its checked and the film density measured. So if your film is developed in the afternoon the strength could be under which will under develop the film. Just as a check compare the edge strip of the film which has been correctly exposed for a reference as to the correct development. Ah, good info. Thanks Misinformation. A processor is _not_ run all day and then "topped up" at the end. There is a metered flow of replenishment chemicals during the time film is moving through the machine. A test strip run during production will not be significantly different from one run at the beginning of the day (which would represent chemical conditions at the end of the previous day). Comparing the unexposed edge strip will not reveal anything unless it was discolored by severe overdevelopment. The base color is built in at manufacture and can naturally vary between film types and batches of the same type. |
#3
|
|||
|
|||
Overexposuring analog film?
On 29/05/2012 2:01 AM, Jeff wrote:
wrote in news:mr-B2EDBA.12300028052012 @News.Individual.NET: In , wrote: On 28/05/2012 5:59 PM, Sandman wrote: The lab that developed my film gave me a tip on analog shooting. He said that I should overexpose my shots by setting the camera ISO setting to a step lower than than actual film. So my T-Max 400 film should be set to ISO 200, and my Portra 160 should be set to ISO 80. Looking at my pics, some are underexposed (which in most cases actually makes them look quite interesting). Do you guys have any comments on this? Its to compensate for them under processing your film. Most labs use a replenishment system to "top up" there chemicals to the correct concentration which keeps them "fresh". Usually labs just go merrily along and seldom check the developer with a test strip during the normal days production. Its only the startup period when its checked and the film density measured. So if your film is developed in the afternoon the strength could be under which will under develop the film. Just as a check compare the edge strip of the film which has been correctly exposed for a reference as to the correct development. Ah, good info. Thanks Misinformation. A processor is _not_ run all day and then "topped up" at the end. I didn't say that. have a re read There is a metered flow of replenishment chemicals during the time film is moving through the machine. A test strip run during production will not be significantly different from one run at the beginning of the day (which would represent chemical conditions at the end of the previous day). Comparing the unexposed edge strip will not reveal anything unless it was discolored by severe overdevelopment. The base color is built in at manufacture and can naturally vary between film types and batches of the same type. You missed the point. |
#4
|
|||
|
|||
Overexposuring analog film?
On 29/05/2012 3:49 AM, Darrell Larose wrote:
Jeff wrote: wrote in news:mr-B2EDBA.12300028052012 @News.Individual.NET: In , wrote: On 28/05/2012 5:59 PM, Sandman wrote: The lab that developed my film gave me a tip on analog shooting. He said that I should overexpose my shots by setting the camera ISO setting to a step lower than than actual film. So my T-Max 400 film should be set to ISO 200, and my Portra 160 should be set to ISO 80. Looking at my pics, some are underexposed (which in most cases actually makes them look quite interesting). Do you guys have any comments on this? Its to compensate for them under processing your film. Most labs use a replenishment system to "top up" there chemicals to the correct concentration which keeps them "fresh". Usually labs just go merrily along and seldom check the developer with a test strip during the normal days production. Its only the startup period when its checked and the film density measured. So if your film is developed in the afternoon the strength could be under which will under develop the film. Just as a check compare the edge strip of the film which has been correctly exposed for a reference as to the correct development. Ah, good info. Thanks Misinformation. A processor is _not_ run all day and then "topped up" at the end. There is a metered flow of replenishment chemicals during the time film is moving through the machine. A test strip run during production will not be significantly different from one run at the beginning of the day (which would represent chemical conditions at the end of the previous day). Comparing the unexposed edge strip will not reveal anything unless it was discolored by severe overdevelopment. The base color is built in at manufacture and can naturally vary between film types and batches of the same type. Good information Jeff, all processing equipment I've used in 30+ years of working in photo labs I've had automatic replenishment the processing machine records the area of the film that passes through it and squirts the correct amount of fresh chemicals to keep the machine in tolerance. have a reread of what I siad! In a hand process, or sink-line the lab tech records how much film he/she has processed and adds replenisher based on the manual volume. If the lab was closed on the weekend, then water may be added to compensate for evapouration, which would make the chemistry stronger, how does adding water make the solution stronger? control strips are run normally each morning at the start of production. Yep Better labs also measure the pH levels, but most just run the control strips. Some labs don't plot their curves, as those send the strips off to head office, I avoid those type of labs, as they can be out of control several days before somebody gets to the branch to correct it. have a re read as to what was said! |
#5
|
|||
|
|||
Overexposuring analog film?
Rob wrote in :
On 29/05/2012 2:01 AM, Jeff wrote: wrote in news:mr-B2EDBA.12300028052012 @News.Individual.NET: In , wrote: On 28/05/2012 5:59 PM, Sandman wrote: The lab that developed my film gave me a tip on analog shooting. He said that I should overexpose my shots by setting the camera ISO setting to a step lower than than actual film. So my T-Max 400 film should be set to ISO 200, and my Portra 160 should be set to ISO 80. Looking at my pics, some are underexposed (which in most cases actually makes them look quite interesting). Do you guys have any comments on this? Its to compensate for them under processing your film. Most labs use a replenishment system to "top up" there chemicals to the correct concentration which keeps them "fresh". Usually labs just go merrily along and seldom check the developer with a test strip during the normal days production. Its only the startup period when its checked and the film density measured. So if your film is developed in the afternoon the strength could be under which will under develop the film. Just as a check compare the edge strip of the film which has been correctly exposed for a reference as to the correct development. Ah, good info. Thanks Misinformation. A processor is _not_ run all day and then "topped up" at the end. I didn't say that. have a re read There is a metered flow of replenishment chemicals during the time film is moving through the machine. A test strip run during production will not be significantly different from one run at the beginning of the day (which would represent chemical conditions at the end of the previous day). Comparing the unexposed edge strip will not reveal anything unless it was discolored by severe overdevelopment. The base color is built in at manufacture and can naturally vary between film types and batches of the same type. You missed the point. Was this your point? Quote: "So if your film is developed in the afternoon the strength could be under which will under develop the film.". If so, this is unlikely because of the continuous replenishment and it could just as easily slightly overdevelop if the metering adds too much replenisher. If not, please clarify. |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
My first analog photos! | Andrew Reilly[_2_] | Digital Photography | 1 | May 28th 12 12:01 PM |
Film for my analog medium format camera | Peter Irwin | Digital Photography | 4 | May 10th 12 08:42 AM |
Film for my analog medium format camera | Joe Kotroczo | Digital Photography | 1 | May 7th 12 03:32 PM |
Old Analog Meter: Any Value ?? | Magnusfarce | Digital Photography | 14 | July 3rd 07 06:53 PM |