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Optical design, performance, & ray tracing: Nikkor 300mm ED F4.5 Non-IF lens

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42 replies to this topic

#26 coinboy1

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Posted 20 August 2020 - 05:03 PM

Thanks everyone for the thoughtful discussion. As far as what the lens actually is versus what the patent calls for I am not sure, I guess the only way to really tell would be to take apart the lens and measure diameters, thicknesses, distances, and radii. 

 

All I know is the lens is a great performer, took this image of M31 Andromeda Galaxy with it on 08/19. Chromatic abberation is very low, less than a lot of ED refractors I have owned. 

 

Image is 1hr 30 min total integration, 3 min exposures unguided with Canon 5D Mark II full frame DSLR.

 

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#27 RichA

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Posted 20 August 2020 - 11:34 PM

Thanks for this.  What would also be interesting is to test that new Nikon 500mm f/5.6 lens that uses the fresnel lens elements.  Technology a tad beyond telescopes, uncertain as to how it would work on stars.



#28 coinboy1

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Posted 23 August 2020 - 09:52 AM

I 3D printed this support to help with the tilt issues. There is a slight amount of slop of the front lens barrel assembly for focusing, this will also help lock the focus because as the lens points at objects near zenith, the focus tends to shift because the barrel is sliding down. This is a downfall of the non internal focusing design, but good because I think in a way I can use the 3 nylon bolts to help adjust collimation of the forward lens barrel assembly. Sounds rudimentary but I will experiment with it on the stars soon and see if it helps with my star images at the edges and corners of my full frame sensor.

 

support.jpg

 

IMG_1954.JPG

 

IMG_1956.JPG


Edited by coinboy1, 23 August 2020 - 09:53 AM.

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#29 coinboy1

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Posted 25 August 2020 - 10:23 AM

The lens support worked. Now stars are mostly round across the entire image on a full frame (36x24mm) DSLR. It truly is a great lens with very low CA. Attached is the image inspection on the uncropped full frame. 

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#30 RajG

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Posted 25 August 2020 - 08:55 PM

Is this the lens? There are several like this for sale on Ebay in the $150-$300 range mostly from Japanese sellers. Buying used lenses off Ebay is a gamble, but looks like you got a good copy, congrats.

 

 

https://www.ebay.com...5.c100005.m1851



#31 coinboy1

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Posted 25 August 2020 - 09:33 PM

Nope the ED version has a gold ring

#32 coinboy1

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Posted 25 August 2020 - 09:50 PM

http://www.photosynt...kon/ai300ed.jpg



#33 coinboy1

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Posted 25 August 2020 - 09:55 PM

Raj, Here is the story of the non ED version. https://imaging.niko.../0070/index.htm Its a good read if your interested. The ebay link you provided was the non ED version


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#34 RichA

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Posted 25 August 2020 - 11:39 PM

Raj, Here is the story of the non ED version. https://imaging.niko.../0070/index.htm Its a good read if your interested. The ebay link you provided was the non ED version

Most non-ED lenses from the camera Dark Ages are next to worthless with high MP count modern sensors.  Even long focal length 600-1000mm lenses aren't worth using.  The worst I've seen was a Pentax 500mm f/4.5.  No sharpness, horrible chromatic effects.  ED glass (as far as I know the Olympus 300mm f/4.5 used a version of it) really improved things and those lenses can be used with modern sensors.  Film was a lot more forgiving than the micro-lenses on the surfaces of sensor pixels.



#35 RajG

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Posted 26 August 2020 - 08:45 AM

Raj, Here is the story of the non ED version. https://imaging.niko.../0070/index.htm Its a good read if your interested. The ebay link you provided was the non ED version

Thanks!



#36 LarsMalmgren

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Posted 27 August 2020 - 08:05 AM

Tony,

 

What is the serialnumber on the lens ?

I got the impression that the non-IF ED version with gold ring starting with serialnumber 200000 was the good one...

 

In any case, excellent find and nice simple solution with the 3D printed support bracket waytogo.gif


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#37 moxican

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Posted 31 August 2020 - 12:21 PM

Most non-ED lenses from the camera Dark Ages are next to worthless with high MP count modern sensors.  Even long focal length 600-1000mm lenses aren't worth using.  The worst I've seen was a Pentax 500mm f/4.5.  No sharpness, horrible chromatic effects.  ED glass (as far as I know the Olympus 300mm f/4.5 used a version of it) really improved things and those lenses can be used with modern sensors.  Film was a lot more forgiving than the micro-lenses on the surfaces of sensor pixels.

Is this the Olympus lens you are referring to? 

https://www.ebay.ca/...08AAOSwNSxfIC6z



#38 vahe

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Posted 31 August 2020 - 05:11 PM

This brings back memories, we are back in film era.

I have two 300mm Nikkors, the oldest is Nikkor-H 300mm f/4.5, a truly beautiful lens but images produced with this lens are very soft at any f stop. My other lens is Nikkor 300/4.5 IF-ED. Based on the reputation of non IF version I searched for Nikkor 300/4.5 ED for several years but was unable to find one in decent shape so I ended up with the IF version. These were primarily used for landscape photography with Kodachrome 25 slide film, that is roughly 20 years ago.

.
It is my understanding that the entire lens assembly in 300/4.5 ED moves back and forth to achieve focus, in the 300/4.5 IF-ED the focus is achieved by continuously changing the focal length of the lens, in another word this lens is 300mm only at infinity focus. I believe Nikon was pressured by camera critics to offer a 300mm lens that could focus faster than the ED version, very much essential for action and sports photography and that is how they came up with IF version, optically a compromise.

.

Vahe


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#39 moxican

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Posted 18 September 2020 - 03:47 PM

Any suggestion where to find this lens? Ebay does not seem to have any...



#40 coinboy1

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Posted 19 September 2020 - 09:42 AM

It is a rare lens and you will just have to keep an eye out.... I think I got lucky with mine. Here is mine:

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  • s-l1600 (2).jpg

Edited by coinboy1, 19 September 2020 - 09:43 AM.

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#41 coinboy1

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Posted 19 September 2020 - 10:00 AM

Latest image from this lens with full frame Canon 5D Mark II. The lens holder works very well to keep focus and collimation! 

 

get.jpg?insecure


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#42 moxican

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Posted 19 September 2020 - 10:38 AM

The filed seems to be pretty much flat and I cannot spot any chromatic aberration whatsoever. Did you have to work it out through post processing or this lens is just really sharp and have no CA at all?



#43 coinboy1

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Posted 19 September 2020 - 12:54 PM

I can not detect much CA at all, it is a very good sharp flat field ED lens. Very minimal processing in my image.


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