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Ronny _Olsson wrote:
Wow.. great shot curtis
What tubes should I have?
thinking of getting some to 135mm
works they also 180mm?
Thinking of getting someone to zeiss with so I get 1:1 on 100 MP
As I understand, I should have the Nikon PN-11 to 1:1 at 100 MP?
I love using tubes with all my lenses. The 180 and 135 will be very happy with tubes. You will wish to experiment to see what length tube satisfies you. Yes, the PN-11 is the tube that brings the 105 f/2.8 AI-s micro lens to 1:1 so it should get you pretty close with the Zeiss lens.
You should be aware, if you're not already, that with extension tubes you lose infinity focus. A dedicated macro lens doesn't hinder you in that regard. The advantage of tubes is that they can be used with any lens and will significantly reduce the minimum focusing distance. But the tradeoff is you will have a very short range within which you can find focus. This is one reason why AI lenses that tend to have a longer focus throw are attractive lenses when shooting with tubes. Of course, the two lenses your considering, the 135 f/2 and 180 f/2.8 have decent throws at 270 degrees and 190 degrees respectively. I don't know the focusing throw of the Zeiss 100 but the time I used one that belongs to a friend it seemed quite a bit shorter.
Of course, this limitation can be overcome simply by moving closer and farther away from the subject you're shooting. This is what I refer to when I say I rock back and forth as I set up a shot. I virtually never use the focusing ring because even turning the ring can cause me to lose focus.
Here is another shot from today, this taken with the 105 f/2.5 P AI'd with the PK-11a and PK-12. I'm less interested in 1:1 than in having enough working room to get a decent shot.
If you're planning to use tubes with Zeiss lenses, you may wish to consider Kenko tubes that will allow the camera and lens to communicate. Nikon tubes will not do so. They were created for manual focus lenses that did not have electrical contacts.
Another jaw dropping capture!!!!!!!!!
I have to experiment more with tubes!