I crop the TC images. Heavily cropping an image shot without the TC is usually inferior due to the loss of resolution,
Paul > On Jul 17, 2021, at 12:15 AM, Alan C <[email protected]> wrote: > > 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 <[email protected]> >>>> 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 >>>> -- >>>> %(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. >>> -- >>> America wasn't founded so that we could all be better. >>> America was founded so we could all be anything we damn well please. >>> - P.J. O'Rourke >>> >>> >>> -- >>> This email has been checked for viruses by AVG. >>> https://www.avg.com >>> -- >>> %(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. >> -- >> %(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. > > -- > %(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. -- %(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.
