Would be interesting to see what the minimum focal distance is with
converter for the Bigma.
I read that w/o converter it is 300 cm at 500 mm, which is rather long.
As I don't do much bird photography this lens would be too heavy for me
to carry around and to keep in the air.
I got a Tamron 70-200/2.8 that is also useful for shots of insects and
flowers, however I leave it at home because of its weight.
Henk
Op 2025-06-09 om 09:09 schreef Larry Colen:
On Jun 8, 2025, at 11:46 PM, Henk Terhell<[email protected]> wrote:
I have no experience with the Bigma, but I think you loose some stops with
extension tubes.
Yeah, you do, probably related to the delta in equivalent crop area. I would
guess that at an extra mag factor of 1.4 linear, you would lose a stop.
For me, indeed the HD 55-300 PLM is most convenient for fast moving insects. It
has fairly fast focussing, is light weight and has a minimum focus distance at
300 mm (450 eq.) of 95 cm. Therefore most of the times I leave my Tamron
90/2.8 macro at home.
Here two shots (somewhat cropped) of bumblebees taken with the 55-300 PLM
yesterday.
https://flic.kr/p/2r9AvQ2
https://flic.kr/p/2r9BtUV
Those are great shots.
I suppose I could calculate magnification by photographing a ruler at minimum
distance and dividing by the width of the sensor.
--
%(real_name)s Pentax-Discuss Mail List
To unsubscribe send an email to [email protected]
to UNSUBSCRIBE from the PDML, please visit the link directly above and follow
the directions.
