A7c and shutter speed

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MDGolfer Regular Member • Posts: 204
A7c and shutter speed

Has anyone felt limited shooting portraits wide open with f1.4 lenses on A7C?

On a sunny day, is the 1/4000 shutter speed fast enough?

Thanks

Sony a7
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QuietOC
QuietOC Veteran Member • Posts: 4,728
Re: A7c and shutter speed

How much do you want to blow out highlights?

I was getting overexposure at ISO 100 with the Rokinon 35mm F1.8 at 1/8,000 s yesterday under overcast sky shooting down on snow using highlight metering on my A7III. I had to drop down to f/3.2 to avoid overexposure. The Rokinon supposedly has fairly poor transmission too.

I also had a lot of trouble using a Maxxum 70 with 1/2,000 s shutter with any prime. It is too bad 1/12,000 mechanical shutters like the Alpha 9 and 9xi film bodies are not available.

You can use ND filters.

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(unknown member) Veteran Member • Posts: 5,193
Re: A7c and shutter speed
2

2MDGolfer wrote:

Has anyone felt limited shooting portraits wide open with f1.4 lenses on A7C?

On a sunny day, is the 1/4000 shutter speed fast enough?

Thanks

Nope .

The sunny 16 rules says f/16 ISO100 1/100

Which is the same lightness as f/1.4 ISO100 1/12800

So 1/4000 is not fast enough if you want to use the widest aperture, unless you use a ND filter.

WaseemH Forum Member • Posts: 87
Re: A7c and shutter speed

Thanks for your replies.

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William Curtindale
William Curtindale Veteran Member • Posts: 9,151
Re: A7c and shutter speed

Christof21 wrote:

2MDGolfer wrote:

Has anyone felt limited shooting portraits wide open with f1.4 lenses on A7C?

On a sunny day, is the 1/4000 shutter speed fast enough?

Thanks

Nope .

The sunny 16 rules says f/16 ISO100 1/100

Which is the same lightness as f/1.4 ISO100 1/12800

So 1/4000 is not fast enough if you want to use the widest aperture, unless you use a ND filter.

I always have an ND 8 filter in my bag if needed. I would probably be using a 3' x 6' light defuser.

When it comes to environmental portraits I always arrange my subject with their back to the sun or setup in the shade (bright sun causes the subject to squint). Actually I like to arrange the subject so the sun will cause a back lit rim around their hair. I will need to wait for nice weather to do outside portraits with my A7C. I would not be shooting at f/1.4 but could be at f/1.8 or f/2.8 with my 85mm f/1.8 or 90mm f/2.8 macro G.

I understand the point the OP is making but I usually don't shoot portraits wide open (so I don't expect an issue for me).

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jb12 Regular Member • Posts: 233
Re: A7c and shutter speed
1

That and the lack of a full mechanical shutter are the reasons I did not buy the a7c. Hope the next version is more photography friendly.

unhappymeal Senior Member • Posts: 1,021
Re: A7c and shutter speed

Christof21 wrote:

2MDGolfer wrote:

Has anyone felt limited shooting portraits wide open with f1.4 lenses on A7C?

On a sunny day, is the 1/4000 shutter speed fast enough?

Thanks

Nope .

The sunny 16 rules says f/16 ISO100 1/100

Which is the same lightness as f/1.4 ISO100 1/12800

So 1/4000 is not fast enough if you want to use the widest aperture, unless you use a ND filter.

I can't wait until Olympus'  and Ricoh's LiveND gets picked up by other systems. It's 2021, there's no need to still be carrying ND filters when you can stack images in-camera.

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