www.photomacrography.net :: View topic - $17 4x Amscope Objective vs $1000 Nikon 35mm Macro Nikkor
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$17 4x Amscope Objective vs $1000 Nikon 35mm Macro Nikkor

 
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ray_parkhurst



Joined: 20 Nov 2010
Posts: 1144
Location: Santa Clara, CA, USA

PostPosted: Wed Jan 17, 2018 8:17 am    Post subject: $17 4x Amscope Objective vs $1000 Nikon 35mm Macro Nikkor Reply with quote

I got my $17 objective based on RobertOToole's excellent 4x shootout:

http://www.photomacrography.net/forum/viewtopic.php?t=36028

This objective is good enough to warrant comparison to the 35MN I recently dug out of mothballs. Here are the Center and Corner compos:





The 4x looks good in the center, but by the corners of APS-C is showing some degradation. Interestingly, while I matched magnification in the Centers, the Amscope changes in magnification toward the corners. This is fairly common to see, but usually it comes with a big IQ penalty. There is only a modest penalty with this 4x, with even the CA holding up reasonably well at the Corner.
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mawyatt



Joined: 22 Aug 2013
Posts: 1204
Location: Clearwater

PostPosted: Wed Jan 17, 2018 8:26 am    Post subject: Reply with quote

Ray,

I've had and used mine ever since Robert posted his colored pencil image. For $17~18 this is probably the best value available at 4X. Sure you may find a bargain old lens on eBay in this price range that has comparable IQ, but this is not an old surplus lens!!

Anyway, thanks for showing.

Best,

Mike
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ChrisR
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Joined: 14 Mar 2009
Posts: 7504
Location: Near London, UK

PostPosted: Wed Jan 17, 2018 9:13 am    Post subject: Reply with quote

The 65mm Macro Nikkor could be better as 4x comes in its designed operating range. I don't have one. Same max aperture.
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ray_parkhurst



Joined: 20 Nov 2010
Posts: 1144
Location: Santa Clara, CA, USA

PostPosted: Wed Jan 17, 2018 6:33 pm    Post subject: Reply with quote

Unfortunately the 65MN does not live up to its reputation. Here it is at 4x vs the 35MN in the Center.



I found the 65MN to be very capable in my shootout at 2.4x but at 4-5x, where it is supposedly optimized, it is disappointing. The above shot was stopped down 1 stop. It was much worse wide open.
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ChrisR
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PostPosted: Thu Jan 18, 2018 5:30 am    Post subject: Reply with quote

That's a pity/surprising. Neutral
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Chris R
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ray_parkhurst



Joined: 20 Nov 2010
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Location: Santa Clara, CA, USA

PostPosted: Thu Jan 18, 2018 8:19 am    Post subject: Reply with quote

ChrisR wrote:
That's a pity/surprising. Neutral


The LoCA of the 65MN is fairly severe. I have owned 3 or 4 copies and all were the same. This last one was sharpest of the ones I've owned so I kept it since it's good to have as a reminder not to buy another one.

Edited to add: BTW, shooting with the 65MN at 4x requires an extended bellows. Not very convenient if you only have a single/normal bellows to work with.
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RobertOToole



Joined: 17 Jan 2013
Posts: 513
Location: United States

PostPosted: Thu Jan 18, 2018 8:07 pm    Post subject: Reply with quote

Excellent work Ray, your post has everything I look for in a shoot-out, and since I do not own any of the Macro-Nikkors so you are very possibly saving me some money!

Thanks for the mention also :-)

All the best,

Robert
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