Search results for 'back focus' - page 1203

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Tamron SP 90 macro or Pentax 100 WR macro

I find the Pentax 100mm macro gives excellent results and as Jak says works well with the Pentax AF160 ring flash. It zooms in and out to focus and the front element with the filter thread doesn’t rotate. I only wish it had a silent motor built in as it can be a bit slow and noisy to focus, and the...

Posted by RobL on 26/07/2018 - 20:41

Tamron SP 90 macro or Pentax 100 WR macro

Do you mean it has Pentax quick shift focusing? Can't remember if it was advertised as such but yes it does and the PF review page (link below) says it does. It was actually advertised with 'fixed rear-element extension (FREE)' but TBH I didn't understand what that meant and still don't! Also has ...

Posted by JAK on 26/07/2018 - 22:00

Tamron SP 90 macro or Pentax 100 WR macro

...... Thanks that was very helpful. One more question if I may, does the focus ring rotate during AF?

Posted by walt on 26/07/2018 - 23:06

Tamron SP 90 macro or Pentax 100 WR macro

...... Thanks that was very helpful. One more question if I may, does the focus ring rotate during AF? It's more of a focus barrel than a ring, and it doesn't rotate during AF. The 100mm macro tends to left on my K-1 ready for anything unusual that turns up in the garden!

Posted by JAK on 26/07/2018 - 23:28

Tamron SP 90 macro or Pentax 100 WR macro

[quote:3496ace15f="JAK"]...... Thanks that was very helpful. One more question if I may, does the focus ring rotate during AF? It's more of a focus barrel than a ring, and it doesn't rotate during AF. The 100mm macro tends to left on my K-1 ready for anything unusual that turns up in the garden![...

Posted by walt on 26/07/2018 - 23:33

Tamron SP 90 macro or Pentax 100 WR macro

That Tamron is really good. When setting the individual lens calibration values on my cameras, this was the only lens I had that didn't require adjustment, and I was blown away with the definition when checking the focus points. Also almost complete lack of chromatic aberration also, which plagued...

Posted by richandfleur on 28/07/2018 - 03:57

Tamron SP 90 macro or Pentax 100 WR macro

I've used both and currently have the DFA100WR. The Tamron purple fringes a lot more than the Pentax. The Pentax is smaller, lighter and WR. Pentas has quick-shift focus. The Pentax is basically a Limited in all but name, on of the best built lenses I've ever seen. The Tamron is cheaper and has a...

Posted by Tyr on 01/08/2018 - 17:11

Tamron SP 90 macro or Pentax 100 WR macro

I assume there must be some lens quality control issues with the last 2 posts, where purple fringing comes up as a problem on both and neither....:shock: Thanks for the feedback. Just a note to say, that I did try and make it clear that the working distance was taken from the front of the lens no...

Posted by walt on 01/08/2018 - 18:01

Tamron SP 90 macro or Pentax 100 WR macro

Hi, just thought I'd update this thread for anyone going through the same decisions. I went for the Tamron SP 90 F2.8 Di, however I bought new but without seeing one first. That was a mistake on my behalf. The problem for me is that the tamron is a 2 stage process to convert from af to manual. First...

Posted by walt on 06/08/2018 - 14:41

Tamron SP 90 macro or Pentax 100 WR macro

I was thinking of going to Olympus to use the 60mm Macro and focus bracketing function (available on eg. E-M5II). I upgraded from the E-M10 to the E-M10 ii for this feature earlier this year (along with electronic shutter). It's a great feature, it's not perfect on the M10 as there is a slight delay...

Posted by walt on 08/08/2018 - 12:15

IR focus register marks

Does anyone know, would the little red points on man. focus (older) lenses still work on/for digital? E.g., Pentax 200mm f4 m, 50mm f1.7m, Kiron 28mm f2.....? Thanks, Roger.

Posted by coker on 26/07/2018 - 18:17

IR focus register marks

Can't see why not - the sensor is still in the same place as the film used to be i.e. the focal plane.

Posted by tigershoot on 26/07/2018 - 18:27

IR focus register marks

As Tigershoot reasoned, they work just the same, but for cameras with live-view thats generally a better option. I used the IR marks when shoot IR with my k100d.

Posted by petrochemist on 26/07/2018 - 18:31

IR focus register marks

Thanks, Gavin & Mike. In live view, with the R72 filter on, it's too dark to focus, surely? Isn't it? Roger.

Posted by coker on 26/07/2018 - 19:08

IR focus register marks

Thanks, Gavin & Mike. In live view, with the R72 filter on, it's too dark to focus, surely? Isn't it? Roger. Not with my µ4/3 bodies even the unmodified ones :)

Posted by petrochemist on 26/07/2018 - 19:19

IR focus register marks

tried on my K3ii and you cannot see a thing. the IR point definitely works , tried that out on my Tamron Adptall 35-70 which has a mark for 35mm and one for 70mm. the 35 IR point is 6mm from standard but the 70 is only 1.5 mm, how you sort out distances between i have no idea. Pentax A70-210 has o...

Posted by redbusa99 on 26/07/2018 - 23:01

IR focus register marks

Back when I had a converted K01 I used the ir points on my m 28mm, f8 and focus points lined up and was good to go no issues at all. Same when using the r72nm filter.

Posted by derek897 on 26/07/2018 - 23:47

If you could only have one Limited prime lens (inc. the 20-40).......

I would suggest the FA 31mm Ltd. Something about the rendering, the way it transitions from in-focus to out of focus sets it apart in my opinion. Also a very handy focal length whether you use aps-c or FF

Posted by pschlute on 25/08/2018 - 18:48

If you could only have one Limited prime lens (inc. the 20-40).......

I would suggest the FA 31mm Ltd. Something about the rendering, the way it transitions from in-focus to out of focus sets it apart in my opinion. Also a very handy focal length whether you use aps-c or FF Would be nice!! But even used it would be more than I could justify spending. The Ltd primes ar...

Posted by Jetsam1 on 25/08/2018 - 19:03

If you could only have one Limited prime lens (inc. the 20-40).......

Seeing love for the 35mm. Does this not have quite a long throw on the AF due to the macro or is it easy to use quick shift and then fine focus with the AF? I did think about the 16-85 until I saw how long the barrel extends. The whole aim of my thinking is to slim down the bulk of the big zooms...

Posted by Jetsam1 on 26/08/2018 - 12:08

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