50L & 85L II wide open, outdoor shooting?

[Dylan777]

Will 2stop ND filter be enough for 50L & 85L II wide open, outdoor shooting?

Thanks guys,


I'm thinking this: http://www.bhphotovideo.com/c/product/120456-REG/B_W_66011363_72mm_102_Neutral.html

 

[jdramirez]

why don't you go outside on a sunny day, set a desired shutter speed, low iso of 160, and then see how many stops you have to go down in aperture. if it requires an f5.6, then you might need a 16.

 

[jdramirez]

last year I was shooting at 1/8000 at f2.8 and an iso of 100 in the bright Sun. so my guess is that you would be looking at a factor of six...

 

[Loswr]

I routinely use a 3-stop ND with my 35L, 85L II, and 135L for outdoor portraits (and it's very convenient that a 72mm filter fits them all). I use this one, it's single-coated and although I bought it before the MRC version was available, I'd probably still get the non-MRC version - the main advantage of a multicoating is that it eliminates most of the reflections that reduce light transmission through the filter, and since the whole point of an ND filter is to reduce light transmission..... (The MRC is also easier to clean, but that hasn't been an issue for me.)

The 3-stop is usually just right, and if it's too dark, there's no meaningful penalty to raising the ISO to 200 or 400.

 

[Dylan777]

last year I was shooting at 1/8000 at f2.8 and an iso of 100 in the bright Sun. so my guess is that you would be looking at a factor of six...

5D III is fine with f1.2 out door @ 100ISO. Sometimes I got too bright photos shooting in sunny day.

 

[Dylan777]

I routinely use a 3-stop ND with my 35L, 85L II, and 135L for outdoor portraits (and it's very convenient that a 72mm filter fits them all). I use this one, it's single-coated and although I bought it before the MRC version was available, I'd probably still get the non-MRC version - the main advantage of a multicoating is that it eliminates most of the reflections that reduce light transmission through the filter, and since the whole point of an ND filter is to reduce light transmission..... (The MRC is also easier to clean, but that hasn't been an issue for me.)

The 3-stop is usually just right, and if it's too dark, there's no meaningful penalty to raising the ISO to 200 or 400.

Thanks Neuro for the tips. It will be shared between 50L & 85L II.

 

[sheedoe]

I mostly use my Heliopan 3 stop ND filter when I am doing video. I also use it outdoors with studio strobes to bring down my shutter speed to sync level when I am using wide aperture. I often use ISO 50 when I need to cut an extra stop of light. I understand its below the native ISO of the sensor, but I was wondering, has anyone noticed any adverse effect of using ISO 50?

 

[Loswr]

I often use ISO 50 when I need to cut an extra stop of light. I understand its below the native ISO of the sensor, but I was wondering, has anyone noticed any adverse effect of using ISO 50?

Basically, when you select ISO 50, the camera is exposing at ISO 100 then digitally pulling the exposure down by one stop. There's no real benefit to ISO 50, except perhaps convenience if you're shooting in Av mode and want a stop slower shutter speed. But if a highlight would be blown at ISO 100 with a given aperture/shutter speed combo, it'll be just as blown at ISO 50.