Pushing +1 stop

[Unai López]

Hi guys, i just wanna know if it's safe yo push one stop my film, the problem is that my lab cant do it. I want yo push 800 ISO film to 1600 bit my lab Will develop It at 800 anyways. Am i going to have decent results?

 

[Sirius Glass]

Color slides? Color negative? Black & white?

 

[MattKing]

"Push" refers to a change in development time to increase contrast in the shadows.
Are you asking if it is safe to under-expose the film by one stop?

 

[Ces1um]

Hi guys, i just wanna know if it's safe yo push one stop my film, the problem is that my lab cant do it. I want yo push 800 ISO film to 1600 bit my lab Will develop It at 800 anyways. Am i going to have decent results?

You'll have workable results. Will you be printing or scanning the negatives yourself, or will you have the lab scan or print them for you?

 

[Unai López]

Color slides? Color negative? Black & white?

Color negativos

 

[Unai López]

"Push" refers to a change in development time to increase contrast in the shadows.
Are you asking if it is safe to under-expose the film by one stop?

Yes i meant to say that sorry

 

[MattKing]

The 800 ISO colour negative films are relatively low in contrast. That helps maintain the quality if the development is increased by a "push" development.
Even without the "push" development, the results will most likely be usable, if not ideal.
Metering will become more critical - subjects with a lot of important shadows will suffer more than subjects with a lot of important mid-tones and highlights.

 

[Unai López]

The 800 ISO colour negative films are relatively low in contrast. That helps maintain the quality if the development is increased by a "push" development.
Even without the "push" development, the results will most likely be usable, if not ideal.
Metering will become more critical - subjects with a lot of important shadows will suffer more than subjects with a lot of important mid-tones and highlights.

I'll try the Next couple if weeks. I Must say that the film is lomo 800 if it's important

 

[jim10219]

You might look for a lab that you can mail it to. No lab within 300 miles will push process my film, but there are 100's of labs that I can mail it to for that service.

For what it's worth, some films work better with under or over exposures than others. Portra is notibley a good film for this. I once shot a roll of Portra 160 at 1600 by mistake. About half my photos were usable. None were great, but I was quite surprised to find so many that were salvagable (at least with some digital manipulation. Wet printing them might have been a different story).

 

[RalphLambrecht]

Hi guys, i just wanna know if it's safe yo push one stop my film, the problem is that my lab cant do it. I want yo push 800 ISO film to 1600 bit my lab Will develop It at 800 anyways. Am i going to have decent results?

probably not.You will get an image with poor shadow detail but midtowns and highlights will be OK.

 

[trendland]

Color negativos

If it is a soo hard job for your lab to push +1 and you can't get support from other labs in your region
AND you are not familiar with film development : I woul "RISC" a normal development (without push).
Your film should be within "tollerance" of modern c41 films from underexposure oft one stop!
There is offen a difference between amatheuric c41 and professional films - that could help you a bit:
Amatheuric films have more speed than box speed!
The reason for this issue is very simple : amatheuric photographers often underexposure films!
So many ISO 200 films are real ISO 250 films (+1/3 stop) but this is no general rule!
I would state +1/3 stop (1 DIN step) is also the max. you sometimes get!

If you have luck!

But is your exposure correct with -1 stop underexposure? Are you sure? Often you might have
more "underexposure" - so if some frames of your film are "real" underexposed (2 full stops)
it will not help (a little bit more speed with amatheuric films).
And with 2 stops below you should notice what others here stated concerning film
characteristics.
At last ISO 800 films! There it is sometimes "overdriven" (the box speed) - you get a bit less speed !

These films may have real ISO +630! Not as a general rule but there is more than a "tendency"
to "overate" the Box speed with ISO 800/ISO 1600 c41 (manufacturers write onto the box).


Before some will protest - I should perhaps more explain :

Sure you get the speed you've paid for (and there is a rating with absolute definied parameters
to come to ISO of a film) but these parameters you get just in manufacturers labs!

In reality you allways have what one define as "tollerance from series production"

These small percentage difference "sometimes" can help a manufacturer to come to his
"high ISO class"!

With low ISO there isn't a problem AND some films have a little " reserve " from "true box speed"!

Everything clear Unai ?

Not realy - I see.......if it would be my film I would save the price for push1 !

with regards

 

[ME Super]

I've personally shot 120 format Portra 800 at EI 1600 (a one-stop underexposure) and had the lab develop normally (as the local camera store can push everything except C-41!) and got usable results. I wouldn't recommend underexposing any more than that without the push to get the contrast boost.

I've pushed 35mm Portra 400 three stops to EI 3200 (this was a send-out to APUG/Photrio sponsor "The Darkroom") and got back usable results, though a bit high in contrast. So under 1 stop, you can get away with developing normally. Any more underexposure than that, and I'd recommend a push.

 

[foc]

C41 colour film push processing is not easy for a lab to do. They either have to have a dip & dunk processor or process by hand in a tank (eg: Jobo, Phototherm or similar). If the lab operates a leader card processor then push process is out (it can be done with temp increase but it's too time-consuming).

Since most modern colour C41 films have good exposure latitude, one-stop underexposure doesn't mean a lot.

What are you going to photograph, under what lighting conditions and how are you going to meter your subject?

 

[trendland]

C41 colour film push processing is not easy for a lab to do. They either have to have a dip & dunk processor or process by hand in a tank (eg: Jobo, Phototherm or similar). If the lab operates a leader card processor then push process is out (it can be done with temp increase but it's too time-consuming).

Since most modern colour C41 films have good exposure latitude, one-stop underexposure doesn't mean a lot.

What are you going to photograph, under what lighting conditions and how are you going to meter your subject?

Push processing isn't easy for a lab ??
What is THEN easy for a lab? To come out with bad prints?

with regards

PS : Autopilot is quite OK ,
but take off and landing is not "easy" for a pilot?

 

[foc]

Push processing isn't easy for a lab ??
What is THEN easy for a lab? To come out with bad prints?

with regards

PS : Autopilot is quite OK ,
but take off and landing is not "easy" for a pilot?

As explained, it is not easy to push process C41, using lab equipment and the results can have colour shifts.

Processing commercially is a lot different than home processing, just as a restaurant cooking is different to home cooking. (I am sure there are more and better examples).

Having used a variety of commercial film processing equipment in the last 40 years, my opinion is still the same. But I am always open to new suggestions.

 

[trendland]

As explained, it is not easy to push process C41, using lab equipment and the results can have colour shifts.

Processing commercially is a lot different than home processing, just as a restaurant cooking is different to home cooking. (I am sure there are more and better examples).

Having used a variety of commercial film processing equipment in the last 40 years, my opinion is still the same. But I am always open to new suggestions.

You are wrong foc !!!!

.....and you are right foc!!!! Both in the same way! It is oft course dependable from the lab.
For big labs it is no problem with push development - and that is still today the same isue as it was during the whole past. That is today with push1, push2, and with push3 (+ 50%/+100%/+200% pricing)
Big labs are going foreward with ALL kind of film developement! Because they are able to give photograaphers still the service they need. What in the past was developed in each lab branch is today centralized in one branch of a big lab player lab.
And when the scale is to low (altought centralisation) they began to collect special films coming from all other lab branches day for day. After one or two weeks the developing machine will run with 378 E6 120 films for a single run (just as an example).
If the demand goes more less it has an end once a day - that is also quite clear. (remember bw positive [Agfa Scala200] of course it was the film (discontinuation) but it was also from the labs.
So pricing these days increased a bit (but not so much from my experience) the increasement is just
from the time you have to wait (up to 3 weeks)
And the same mechanism is to push development with c41.
Push3 makes no sense (from my point) - but when you are able to wait 4 - 6 weeks for your film
it obviously is possible!
My real smal lab I use just from time to time for some film scans is offering push1-3 till today!
But the owner of this lab is a real film enthusiast I have to state. I guess he earned no money
from push processing because he get not 350 films even in 2 years!
But on the other side he serve the last remaining (little pros lab in town) all others go buncropt years ago! Now he is the market leader in a metropol region! And that is the conclusion from my point :

It is a service - a real special service to photograpers (he can't earn money from smal scale developing) but he has a full service and he definitifly will earn money with prints!
And he is of course supported from the remaining pros who use films and from pros who need
high quality prints from digital.
There he is quite expensive but it is also high quality!
I remember a photigrapher who discussed colors he want to have to his prints!
He got it exact the way he prefers! No problem to the lab and no additional cost even for the 3.
time New prints!
As you asked for new suggestions - this is a way wich may have future!
But to most labs smal scale is the end of business! It is a special kind of "selection" :
Dinosaurier labs with poor quality we all remember from the 80th have gone first.
Big player labs with 89% amatheuric photographers market dominance from the past - found new business sections ! And with small labs we regard a real "survival of the fittest" these days!

with regards