Why the 12mm prime barrier?

Started 3 months ago | Discussions thread
eques Veteran Member • Posts: 3,889
MF with UWA
2

Chris666666 wrote:

mount evans wrote:

Chris666666 wrote:

Laowa have exploited the territory. There has been a 7.5mm available for several years, and a new 10mm has just been launched. Both are f2.0

And both manual focus. Someone needs to update the list on Wikipedia.

Manual focus is not an issue because of the massive depth of field with lenses this wide, even if you are unfamiliar with using manual lenses.

Depth of field is a theoretical construct of acceptable lack of sharpness.

I have a Samyang 7.5mm fisheye lens, and even on my 24 inch screen and f/5.6 it can be seen very well when my subject is out of focus.

The main problem is, that there is no hard stop at infinity and so it is easy to set focus beyond infinity without realising this in the EVF or LCD screen. So you have to use focus magnification to get a really sharp result.

I expect this will apply to the Laowa lenses as well.

Peter

 eques's gear list:eques's gear list
Panasonic Lumix DMC-GX8 Panasonic Lumix G 20mm F1.7 ASPH Olympus 12-100mm F4.0
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