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Using FX AF Nikor lenses on a D7100
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Nov 18, 2015 19:31:59   #
asjohnston3 Loc: Irving, TX
 
Just got a refurbished D7100. I have been looking at older FX AF lenses (one of the main reasons I bought the 7100) and am considering the Nikon AF Nikkor 70-300mm f 4-5.6 ED D FX lens. If I have it figured right this will give me a 105 - 450mm range. If so it would be a great companion to my 18-105 DX lens. Any pros or cons on using a FX lens like this on the 7100?

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Nov 18, 2015 19:42:38   #
Bill MN Loc: Western MN
 
ajohnston3 wrote:
Just got a refurbished D7100. I have been looking at older FX AF lenses (one of the main reasons I bought the 7100) and am considering the Nikon AF Nikkor 70-300mm f 4-5.6 ED D FX lens. If I have it figured right this will give me a 105 - 450mm range. If so it would be a great companion to my 18-105 DX lens. Any pros or cons on using a FX lens like this on the 7100?

I had the 70-300mm lens sold it bought the 28-300 much better lens. On a D7100 you also have another 1.3 setting which gives you close to 600mm.

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Nov 18, 2015 21:17:59   #
martinfisherphoto Loc: Lake Placid Florida
 
Break open the piggy bank and get the 70-300mm AF-S VR lens. I use it for birding and it's better than the rest for that reason if you ask me. New in the $500 range, used in the $300 Range. I know you bought you camera to have the focusing motor to focus all of the older lens, but bottom line is Still, Good Glass.. Don't waste your money buying lots of cheap glass, you'll be back asking why all of your images are not sharp.

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Nov 19, 2015 07:28:19   #
jerryc41 Loc: Catskill Mts of NY
 
ajohnston3 wrote:
Just got a refurbished D7100. I have been looking at older FX AF lenses (one of the main reasons I bought the 7100) and am considering the Nikon AF Nikkor 70-300mm f 4-5.6 ED D FX lens. If I have it figured right this will give me a 105 - 450mm range. If so it would be a great companion to my 18-105 DX lens. Any pros or cons on using a FX lens like this on the 7100?

See what the pros have to say about the 70-300mm vs the 28-300mm.

http://www.dpreview.com/products/compare/lenses
http://lenshero.com/lens-comparison
http://www.the-digital-picture.com/Reviews/ISO-12233-Sample-Crops.aspx
http://www.lenstip.com/lenses.html
http://www.dxomark.com/Lenses/Compare

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Nov 19, 2015 10:48:34   #
Mark7829 Loc: Calfornia
 
Let me weigh in. A DX camera with a FX lens will not be as sharp as a DX camera with a DX lens. Tony Northrup did a video on this last December. This is contrary to the believe that the DX camera will render a sharper image with a FX lens since it is theorized to use only sharpest part of the lens. You can prove this yourself using DxO interactive website. Take a DX camera and add a FX lens and then add a comparable DX lens and the result will be the DX lens is sharper.

The bottom line ... to render the best images use DX lenses on DX camaeras.

Check out https://www.youtube.com/watch?v=YDbUIfB5YUc

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Nov 19, 2015 19:31:11   #
PAR4DCR Loc: A Sunny Place
 
I agree with Mark. I have the D7100 and the 70-300 VR FX lens. I find that I do not get real sharp images with this combination.

Don

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Nov 19, 2015 22:57:39   #
pmackd Loc: Alameda CA
 
PAR4DCR wrote:
I agree with Mark. I have the D7100 and the 70-300 VR FX lens. I find that I do not get real sharp images with this combination.

Don


The 70-300 VR FX lens (or possibly a third party equivalent) is probabaly the best you can do on a D7100 without spending a bundle. The key to getting sharp images with this combination is NOT to shoot at or near 300mm. If you need maximum reach shoot at 240mm and crop a little more. World of difference.

But Mark's basic point is correct because DX lenses can be made with smaller individual lenses than are needed to make FX lenses and it's a lot easier to make small lenses without excessive distortion than it is to make big ones.

Nikon makes a 55-300 VR mm DX lens which is cheaper and lighter than the 70-300 VR FX. I haven't used it nor I have I seen a really detailed comparison of the two lenses on a DX camera, but my impression is that the 55-300 is slightly inferior in optical quality and very inferior in build quality.

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Nov 20, 2015 02:50:19   #
asjohnston3 Loc: Irving, TX
 
I want to thank everyone for their great feedback on this issue. I really appreciate all the valuable information. It looks like DX is the way to go as a general rule of thumb. (with the possible exception of wildlife photography) Thanks again to all....

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Nov 20, 2015 06:54:07   #
martinfisherphoto Loc: Lake Placid Florida
 
As in all wildlife photography, it's about getting close. Here's only one example of hundreds more I've shared on the hogg.. D7000 and the Nikon AF-S 70-300mm VR. A $300 used lens. You can't compare this lens to a $15,000 lens, but it is Unbeatable for the money........I also use it at 300mm, 99% of the time, unless I'm too close.
PAR4DCR wrote:
I agree with Mark. I have the D7100 and the Nikon 70-300 VR FX lens. I find that I do not get real sharp images with this combination.

Don


(Download)

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Nov 20, 2015 07:04:10   #
martinfisherphoto Loc: Lake Placid Florida
 
Absolutely Wrong. You can't listen to folks that can't shoot wildlife with a DX set-up. To see if someone is even Qualified to make this statement, look at their portfolio. Everyone is an expert on the web, lacking credentials that is....
ajohnston3 wrote:
I want to thank everyone for their great feedback on this issue. I really appreciate all the valuable information. It looks like DX is the way to go as a general rule of thumb. (with the possible exception of wildlife photography) Thanks again to all....

Reply
Nov 20, 2015 11:40:04   #
Mark7829 Loc: Calfornia
 
martinfisherphoto wrote:
Absolutely Wrong. You can't listen to folks that can't shoot wildlife with a DX set-up. To see if someone is even Qualified to make this statement, look at their portfolio. Everyone is an expert on the web, lacking credentials that is....


I think this is an excellent image, a great capture in good light. The blue sky and its softness hides any details for a greater technical analysis. There are some issues including chromatic aberration (dark magenta) and softness on the edges of the wings and frame. These issues become more apparent in fine and large print. Artistically, good, and technically good. One con not generalize from a single image. Technical analysis is best done by certified laboratories.

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Nov 20, 2015 12:47:52   #
asjohnston3 Loc: Irving, TX
 
martinfisherphoto wrote:
Absolutely Wrong. You can't listen to folks that can't shoot wildlife with a DX set-up. To see if someone is even Qualified to make this statement, look at their portfolio. Everyone is an expert on the web, lacking credentials that is....

I was actually talking about using full-frame lenses on a 7100. (for wildlife)
Sorry I didn't clarify that.... More specifically I was thinking about the youtube video referred to earlier in the thread.
https://www.youtube.com/watch?v=YDbUIfB5YUc
It makes some excellent points about why DX lenses almost always are a better choice with a DX body and why in certain specific instances a FX lens might work well when shooting wildlife with a 7000 - 7200 body.... BTW.... IMHO, your lens choice appears to be a great balance between cost and quality.... you certainly got great results with your eagle shot... What I'd really like to hear is more feedback from folks using the 70-300 AF FX with a 7100.... Their appear to be some conflicting opinions about this set-up.

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Nov 20, 2015 12:58:54   #
CraigFair Loc: Santa Maria, CA.
 
ajohnston3 wrote:
Just got a refurbished D7100. I have been looking at older FX AF lenses (one of the main reasons I bought the 7100) and am considering the Nikon AF Nikkor 70-300mm f 4-5.6 ED D FX lens. If I have it figured right this will give me a 105 - 450mm range. If so it would be a great companion to my 18-105 DX lens. Any pros or cons on using a FX lens like this on the 7100?

Equiv. focal length 105-450 mm (full format equivalent)
Equiv. aperture f/6-f/8.4 (full format equivalent, in terms of depth-of-field)
In other words it is actually an f/6 which is a really high base f/stop.
Only good for cloudy to sunny days or flash.
Craig

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Nov 20, 2015 15:21:26   #
pmackd Loc: Alameda CA
 
ajohnston3 wrote:
I was actually talking about using full-frame lenses on a 7100. (for wildlife)
Sorry I didn't clarify that.... More specifically I was thinking about the youtube video referred to earlier in the thread.
https://www.youtube.com/watch?v=YDbUIfB5YUc
It makes some excellent points about why DX lenses almost always are a better choice with a DX body and why in certain specific instances a FX lens might work well when shooting wildlife with a 7000 - 7200 body.... BTW.... IMHO, your lens choice appears to be a great balance between cost and quality.... you certainly got great results with your eagle shot... What I'd really like to hear is more feedback from folks using the 70-300 AF FX with a 7100.... Their appear to be some conflicting opinions about this set-up.
I was actually talking about using full-frame lens... (show quote)


D7100 with 70-300 VR FX at 250mm. The hummingbird is cropped a little more than 2x; the Blue Angels 1.2 x.


(Download)


(Download)

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Nov 20, 2015 15:30:38   #
CraigFair Loc: Santa Maria, CA.
 
pmackd wrote:
D7100 with 70-300 VR FX at 250mm. The hummingbird is cropped a little more than 2x; the Blue Angels 1.2 x.

Beautiful work Pmackd.
Craig

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