Igor, I did a lot of tests too. The TC shots were always inferior to the
cropped shots without TC. I only have consumer lenses so I can't comment
on how a TC performs with Limited or Star lenses. Paul's bird images
with the D-FA 150-450 with 1.4x TC (=630mm) are so good which seems to
suggest one need to start with top line glass. I'll dig out some of my
test shots & post. I had a 1.7x TC AF converter from film days which I
have now sold.
Alan C
On 12-Jun-20 10:31 PM, Igor PDML-StR wrote:
Hi Larry!
A while back, I've had a few occasions when I had a chance to compare
a lens+TC vs lens+cropping.
My overall impression was that indeed, sometimes, going without TC
might be as good or even better than with TC (but not always).
I remember two cases when no TC was better.
1. I was shooting vultures at the top of an old dead tree against the
sky (which, IIRC, was greyish).
It seems to me that the extra glass was making the already bad
contrast situation even worse.
However, even without the TC, the pictures weren't very good... So,
it without the TC the images were not as bad.
2. I did a photo session with the then resident spider.
http://42graphy.org/galleries/spider/ (Sorry, back than I created the
gallery with Flash, and after that I've never gotten to redoing it
with HTML.)
I shot with Pentax D-FA 100/2.8 macro (pre WR version), and with that
+ Pentax 1.7x AF, and (IIRC) also Pentax x2.0 (manual focus).
The problem with the TC was the extremely shallow DOF.
But now I am thinking if the 2nd image in the gallery
("Close encounter IMGP4030") was actually taken with the 1.7x AF. I
don't remember now.
Igor
Larry Colen Wed, 10 Jun 2020 20:26:02 -0700
I took some photos of Mombird today with the bigma, and some with the
bigma
plus my 2x teleconverter (which becomes manual focus)
It’s my impression that the best with the TC are a little bit better than
cropping without it, though with manual focus I missed many more shots.
It’s pretty warm here, I think she was opening her mouth to try to
cool off. I
did try to get a couple at the end of the day, I’ve got a light set up
from a
distance away and it’s hard to tell if it helps or hurts during daylight.
No teleconverter
https://www.flickr.com/photos/ellarsee/albums/72157714656240811
With teleconverter
https://www.flickr.com/photos/ellarsee/albums/72157714657851507 take
some macro photos with both a macro lens, and a macro len
Larry Colen Wed, 10 Jun 2020 20:26:02 -0700 wrote:
I took some photos of Mombird today with the bigma, and some with the
bigma plus my 2x teleconverter (which becomes manual focus)
It’s my impression that the best with the TC are a little bit better than
cropping without it, though with manual focus I missed many more shots.
It’s pretty warm here, I think she was opening her mouth to try to
cool off. I did try to get a couple at the end of the day, I’ve got a
light set up from a distance away and it’s hard to tell if it helps or
hurts during daylight.
No teleconverter
https://www.flickr.com/photos/ellarsee/albums/72157714656240811
With teleconverter
https://www.flickr.com/photos/ellarsee/albums/72157714657851507
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