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Telephoto options over 200mm

Started Jan 8, 2022 | Questions thread
User1303423862 Senior Member • Posts: 1,070
Re: SUCCESS!
1

Larry Rexley wrote:

User1303423862 wrote:

R2D2 wrote:

SUCCESS!

Hey Larry, many thanks for all you've posted about this MOD. It's a great addition to the camera bag, and even moreso a great addition to the Forum!!

I took the TC apart again (for like the umpteen millionth time) and this time I stretched out the springs a tiny bit (about 1mm). Put it all back together and SUCCESS!!

I gotta run to work now, but many thanks again!

R2

Congrats on the mint lens and your eventual success with the TC mod R2!
My lens arrived yesterday while I was at a job interview down in London, and the adapter was delivered this morning. All good! Nice clean lens with snappy autofocus and fantastic IS. Here's a crop of an ornament on the windowsill, handheld at 1/30. Amazing.

Just waiting for the metal EF conversion backplate for the lens now, and I'll become a fully paid up member of the 1.5x55-250 club!

Yep, looks like a good one! I have not heard of much copy variation with the EF-S 55-250 though, they seem to be pretty consistent.

To answer your previous question, I have not yet gotten a chance to do Milky Way photography with the Rokinon 8mm yet, waiting for a nice dark night and a chance to drive to darker skies!

I see from the EXIF data you have an M6 (not the Mark ii). I think it will be able to autofocus in good light with the zoom at 250mm x 1.5 teleconverter at equivalent f8, but might struggle in lower light. I had an M6 prior to the M6 Mark ii and the M6;s low light AF was 2-3 EV behind the M6ii. If you are planning to remove the electronics from the TC, I'd suggest testing the 55-250 x 1.5 combo well and find out its capabilities before the removal, It should work better after the removal.

I recall the M6 had trouble autofocusing with my original M6 and a 2x MC7 TC with Kiron optics (f11 equivalent). At that time I did not have a 1.5x TC. The M6 Mark ii has no trouble with that combo, or even a 3x tele that I made with vintage Soligar 3x optics, or a 2x MC7 with vintage Kiron optics stacked with the Kenko 1,5x,

Hi Larry, and thanks for the advice. I'm a low budget hobbyist and have learned to accept the limitations of being a few years behind the tech curve with the second user equipment I buy. If the 55-250 struggles in lower light with the TC I'll adopt the pragmatic solution of removing the TC and cropping into the image If I can't walk closer to my subject for whatever reason.

I'd love to upgrade to the M6ii and just heard I got the job I interviewed in London for yesterday, so that happy day might be sooner than expected.

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 User1303423862's gear list:User1303423862's gear list
Canon EOS R Canon EOS M6 II Canon EF-M 22mm f/2 STM Canon EF-M 28mm F3.5 Macro IS STM Canon 70-300 F4-5.6 IS II +4 more
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