Reason for slow flash sync speed

Started Mar 13, 2014 | Discussions thread
Shop cameras & lenses ▾
le_alain Senior Member • Posts: 1,536
Re: Reason for slow flash sync speed

dotborg wrote:

le_alain wrote:

dotborg wrote:

The A7 has 1/250s sync because it has electronic first curtain.

No, even if you use the mechanical first curtains.

Let me put it a different way: Because the A7r lacks electronic first curtain capability, Sony had to slow down the shutter movement in order to minimize the vibration. This lowered the sync speed from 1/250s to 1/160s.

Hope that makes it more clear.

I did the try with my A7 set at 1/250s and flash on a white wall.

with e-curtain, and with mechanical first curtain.

Both pictures are the same, and you don't see the second curtain on both.

On my A7, mechanical 1/250s synch work.

 le_alain's gear list:le_alain's gear list
Epson R-D1 Sony Alpha 7S Sony Alpha 7R II Sony FE 55mm F1.8 Sony FE 24-70mm F4 OSS
Post (hide subjects) Posted by
Keyboard shortcuts:
FForum PPrevious NNext WNext unread UUpvote SSubscribe RReply QQuote BBookmark MMy threads
Color scheme? Blue / Yellow