Comments made by smudge - Page 5

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Very impressive! You are certainly putting the field monitor to much better use than I ever did. The considerable depth of field you are getting with this setup is a surprise to me.

Comment by smudge posted on Extreme macro with an 'empty lens' -- IMAGE HEAVY at 25/01/2018 - 17:18

RobL wrote:

johnriley wrote:
This stems from some early problems with a design fault in a couple of SDM lenses and it was tackled years ago by Pentax. There will always be some failures of any item, but SDM should be as fine as any other focusing system motor. WE haven't heard much about the issue for a very long time.

Swarf’s lens is only three years old, so unless it was old stock it sounds as if the issue hasn’t been fully sorted yet.

I am concerned because I am thinking of a DA*200mm lens.

The SDM on my 16-50 failed and had to be replaced. Even with the new motor it soon became sleepy and I lost confidence in it and traded it in for a 20-40. However, my other SDM lenses - DA* 200, DA* 60-250 and DFA 24-70 - have never given any problems. I suspect the design of the 16-50 makes greater demands on the motor. The DA*200 is a great lens. I don't think you will be disappointed.

Comment by smudge posted on SDM Failure at 08/01/2018 - 09:59

Yes, it's been an interesting exercise. I have never used the 1:1 crop before but I may well do in the future - it widens the range of suitable lenses considerably.

Comment by smudge posted on DA Limited lenses on the K-1 at 11/12/2017 - 23:22

Just to add to my previous comment, I just tried the 40mm on the K1 in 1:1 crop mode and the coverage is good even at f2.8. The 21mm has to be stopped down to f8 to get good 1:1 coverage. The 15mm cuts the corners even at f11.

Comment by smudge posted on DA Limited lenses on the K-1 at 11/12/2017 - 23:09

The 15mm and 21mm are only suitable for use in crop mode. I have the XS version of the 40mm, which works well in F/F with only a small amount on vignetting at f2.8 which improves when stopped down. I imagine the 40 ltd would perform in the same way. The 70mm performs very well in F/F with less vignetting than some designated F/F lenses.

Comment by smudge posted on DA Limited lenses on the K-1 at 11/12/2017 - 22:44

Aitch53 wrote:

One last thought, it strikes me as a shame that it’s so much easier and cheaper to produce big CMOS sensors compared with CCD, I suspect a big-CCD based camera would be quite impressive...

Hmm...I think a 645d is what you are looking for...

Comment by smudge posted on Oh, not him again! at 01/12/2017 - 16:48

Mitakon? Back in the 1980's I had a poor quality 28-80? zoom lens by Mitakon that was all I could afford at the time. Not good at all. I am surprised they are applying that brand name to high price items now.

Comment by smudge posted on fast 135 lens at 26/11/2017 - 18:40

It is my most used lens on the K1. The only negative is the vignetting at some settings. It gives quality results and is remarkably small and light, which is not something you can say about most F/F zooms!

Comment by smudge posted on What's your view to the DFA 28-105 ? at 25/11/2017 - 15:52

I find the K1 + 28-105 an excellent combination. The weight is similar to the K3 + 16-85 combo - the K1 is heavier but the lens is lighter. As a modern lens the 28-105 has the latest coatings, silent focusing and WR. In those aspects it offers superior performance to even the best of the older lenses, such as the FA 31 and FA 85, which are prone to purple fringing.

Comment by smudge posted on K-1 Upgrade thoughts. at 01/11/2017 - 15:38

It looks enormous compared to the current 50mm 1.4

Comment by smudge posted on DFA* 1.4 50mm Also Rumoured at 26/10/2017 - 16:05

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