Actually, the Sigma 180mm 2.8 macro is also effective 115mm at 1:1
If I may believe the formula I found some time ago ;-).
I collected data from some macro lenses. They are as good as their source
(which I don't provide ;-).
All in here: <
https://docs.google.com/spreadsheets/d/197SJW1pA3EU23pUm6nwE_0Xsg6gyAyfmQn2rqfZ_UMM/edit?usp=sharing
>
Improvements always welcome.
Enjoy, Frank.
Op do 9 feb. 2023 om 01:18 schreef Mike Gordon via olympus <
olympus@xxxxxxxxxxxxxxxxx>:
> Overall a very nice addition and has sync IS. A modest positive surprise
> is that it works with both TC's 1.4X and 2X. Not that is needs any more mag
> but as expected the
> working distance is a bit tight. Close focusing distance in S macro mode
> (odd ball switch which moves lens elements and lose max aperture goes to F5
> or F5.6, (reviews were discordant)) is 8.8 " with working distance 2.5."
> (2:1 magnification). Working distance at 1:1 only 3.7". Effective focal
> length at 1:1 about 112mm not 180 mm ---- but that isn't totally fair even
> if technically correct as really should use focus distance at 1:2 to
> calculate. I could not find that. Anyway, some of that is related to the
> MFT format and some to focal length shortening. It really is only a 180 mm
> FF equivalent fov at infinity. For skittish critters a high-quality long
> FL zoom with achromatic CU diopter may still be a tad better than the new
> lnes by itself. A 1.4 TC with the new lens might be a very good choice,
> however. Testing should be done.
>
>
>
> https://tinyurl.com/32kvw8jm
>
> Macro Mike
>
>
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