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Tube for Nikon objective

 
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Harald



Joined: 13 May 2011
Posts: 457
Location: Steinberg, Norway

PostPosted: Fri Apr 13, 2018 12:40 pm    Post subject: Tube for Nikon objective Reply with quote

Hi there,
I have a Nikon objective.
It says: Nikon Plan APO 0.4 160/0.17 10x
Can I use my 70-200 f/2.8 as a tube @160 for this objective on my Eos 7D?
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Harald

Lier Fotoklubb / NSFF
AFIAP / CPS
BGF / GMV
http://www.500px.com/blender11
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ChrisR
Site Admin


Joined: 14 Mar 2009
Posts: 7787
Location: Near London, UK

PostPosted: Fri Apr 13, 2018 2:23 pm    Post subject: Reply with quote

You'll get an image, but as you'll know it should be used without a "tube" lens. Your tube length will be well off, (by infinity minus 160mm Wink ), NA0.4 is enough for that to notice.
That objective has rather a short WD iirc?
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Harald



Joined: 13 May 2011
Posts: 457
Location: Steinberg, Norway

PostPosted: Sat Apr 14, 2018 10:18 am    Post subject: Reply with quote

I think you're right about the WD. Not much to focus on. As I intended to use it for mineral photography, I´ll be better off saving some money for a Mitu 10x.

Thanks for your reply Chris R
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Harald

Lier Fotoklubb / NSFF
AFIAP / CPS
BGF / GMV
http://www.500px.com/blender11
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