lens questions - redux

thanks to all for offering two cents (and more) on this question.

In reading through the responses, I have some clarifications and some
extra questions.

First, a clarification: Provia is a transparency film, so the negs being
dark = underexposure, not overexposure. (It's also possible that I
pushed the film instead of pulling it, and two stops might have been too
much.)

Exposure comp on the D-1 was set to 0 - unless it automatically protects
itself from burning out.

I hadn't thought of using a Polaroid to test the 'blad. Duh!

Here's a question: Bob is suggesting hitting the scene with a massive
light source. Wouldn't that destroy any chance of grabbing the flying
sparks? (I can imagine using a fill flash to give some depth to the face
shields, gloves work area, etc. but it seems all the magic of welding is
in the fire/heat/spark. Maybe this is a is a difference in artistic
approach.)

Barry

>
> Barry Kleider wrote:
>
>> Last week, I was shooting some welders.
>>
>> My ultimate goal was to shoot them with a Hasselblad and a 150 f4
>> lens. (No internal meter.)
>>
>> Since these exposures are obviously tricky, I started with my Nikon
>> D-1 and a Tamron 28-70 f2.8
>>
>> I was getting some decent exposures - nothing great, but certainly
>> within tolerance for a first attempt. So I decided to switch over to
>> the Hassy using the same readings.
>>
>> Since the Nikon was running at ISO 200 and my provia is 100, I gave
>> it a full stop. I got the lab results today: $%#^$%. (Translation:
>> way too dark and looks like s**t.)
>>
>> So my question is: what's the relationship between a medium format
>> Hassy with a 150 f4 lens, and a 35mm Nikon with a 28-70 f2.8 lens
>> (running close to 70 if not full on)?
>>
>> I assume there's a very straight-forward (though possibly hard to
>> follow) explanation having to do with the difference in lens designs
>> rather than a format comparison or a digital vs. analog thing (as my
>> lab guy surmised.)
>>
>> Barry
>
Received on Wed Jul 6 22:16:20 2005