Yes, Paul, I agree. Your images are excellent. Do you crop the TC images
& if you cropped an image without the TC to the same size would it be
just as good?
Alan C
On 16-Jul-21 08:41 PM, Paul Stenquist wrote:
Most of my bird photos are shot with the DA 1.4x. Excellent glass,
Paul
On Jul 16, 2021, at 1:55 PM, P. J. Alling <webstertwenty...@gmail.com> wrote:
The short answer is no they're not a scam. However, most TCs will magnify any
shortcomings in the system they are added to. Cheap TCs come with their own
sets of optical problems and failings, but a good one, or a matched TC will
give good enough results, for a price. The problem is as time goes on you
often don't get what you pay for. I played around with a number of TCs
inexpensive and in some cases very expensive during and after the film era and
the only ones that really were worth while that I used, were the Pentax 1.7 AF
adapter, not strictly a TC but it works as one on lenses up to the * 300mm f4.0
twins, with decent results. Though neither of those lenses is the most
optically stellar Pentax telephotos. The Vivitar 2x Macro focusing TC worked
very well with shorter focal lengths say between 40mm and 100mm, especially on
film, on digital it was a little less useful and the images sometimes left a
bit to be desired. The Vivitar 70-150mm with it's matched multiplier gave
results that were very close to the lens alone, unfortunately that lens was
subject to an incredible amount of veiling flair so unless the photo gods were
smiling the results were pretty poor most of the time.
On 7/16/2021 5:00 AM, Alan C wrote:
All teleconverters degrade the image to some extent, 2x more than 1.4x. In film
& 6Mp days cropping wasn't really an option so they did give more reach without
the expense of a longer lens. Long ago I had an M42 Vivitar 2x which made my
SuperTak 55/2 a useful 110/4. Given a high quality TC and a fast host lens, good
results are possible. However with the high Mp sensors now in common use, a cropped
image without the TC may be just as good or even better so what is the point? Only
perhaps cropping options of the TC image which starts with full Mp?
Alan C
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