R5 max apertures

Can anyone help me with the TRUE maximum aperture of the R5 at:

28mm
100mm
200mm

Would like an idea of how much the lens stop down when extended.

Thanks,
MTMT

MT said:

Can anyone help me with the TRUE maximum aperture of the R5 at:

28mm
100mm
200mm

Would like an idea of how much the lens stop down when extended.

Click to expand...

FIrst clue - http://www.dpreview.com/reviews/specs/Ricoh/ricoh_caplior5.asp

I believe 3.3 - 4.6 - 4.8 ... or something like that ...

I think it's the same as R4
28mm=3.3
105mm=4.2
135mm=4.5
200mm=4.8
mesured with step zoom
Christian

28mm, f/3.3
35mm, f/3.9
50mm, f/4.5
85mm, f/4.8
105mm, f/4.2
135mm, f/4.5
200mm, f/4.8

Prog.

Guy Parsons' page has a more complete table which also includes the stopped-down aperture range:

http://homepages.ihug.com.au/~parsog/photo/r3-01.html#aperture

Easy to remember redirect to this page: http://ricoh.sent.com/

Prog.

Prognathous said:

Guy Parsons' page has a more complete table which also includes the
stopped-down aperture range:

http://homepages.ihug.com.au/~parsog/photo/r3-01.html#aperture

Easy to remember redirect to this page: http://ricoh.sent.com/

Click to expand...

Hi Prog, thanks for your tests and it does seem the R3/4/5 all behave the same in the aperture department with that "kink" around 85mm.

The limited aperture range does help to limit flash performance and also as I found, it prevents you from trying to use ISO 400 at wide angle in full sunlight. I really don't know why anyone would want to do that but every other camera I've owned will do ISO 400 OK full zoom range in sunlight.

The limit is the very small aperture range available at 4.6mm (28mm equiv) where it goes from f/3.3 to f/5.0. Divide 4.6mm by f/5 and end up with 0.92mm as the physical aperture opening size. That's very small and most likely limited by the mechanics of the aperture and thickness of blades.

Things will not improve unless this camera moves to a larger sensor, which would mean a larger overall camera and spoil the package. So we have to learn to live with it.

Regards.............. Guy

Thanks for being so helpful. For some reason, I did not see the info posted on DPReview's announcement on the R5.

MTMT

Guy Parsons said:

...
The limit is the very small aperture range available at 4.6mm (28mm
equiv) where it goes from f/3.3 to f/5.0. Divide 4.6mm by f/5 and
end up with 0.92mm as the physical aperture opening size. That's
very small and most likely limited by the mechanics of the aperture
and thickness of blades.

Click to expand...

Actually diffraction is the main problem

Guy Parsons said:

Things will not improve unless this camera moves to a larger
sensor, which would mean a larger overall camera and spoil the
package. So we have to learn to live with it.

Click to expand...

Yes, a bigger sensor with bigger pixels will help ... but the lens will also need to be changed so ...