Nikon 65mm F/4 Nikkor Sw Copal Bt Review
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2-Apr-2005,05:50 #one
Nikon Nikkor 65mm SW, f:4 - Sharpness
I just shot my kickoff xx sheets with my 65mm Nikon Nikkor lens and the results are somewhat disappointing. I expected this lens to be tack sharp but my slides tell a unlike story. I used f22 and f32 apertures, took my time in focusing, but I can't get everything tack sharp. Even when I look on the GG, the outer rim is blurry - is this normal for these extreme wide angle lenses.
The widest lens I had used and then far was a Rodenstock 6.8 90mm lens and I never had this trouble before.
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2-Apr-2005,09:02 #2
Nikon Nikkor 65mm SW, f:4 - Sharpness
The 65mms with which I'm familiar from Rodenstock, Nikon, and Schneider all accept an image circle of 170mm, which is just barely more than needed to cover 4x5 with about no room for movements. And so even without any movements the edges of the image are pretty much at the outer limits of the image circle where virtually lenses aren't at their best. Still, if y'all weren't using any movements I would have idea you could become a precipitous image. Have yous examined the lens for concrete defects, eastward.g. separation of the elements, fungus, that kind of thing? Were you lot using any movements when you lot made the photographs? I don't know how valid comparisons are between lenses used with digital and pic but FWIW I use a Nikon 17-35mm lens on my Nikon D100 and it's tack sharp.
Brian Ellis
Before you criticize someone, walk a mile in their shoes. That way when yous do criticize them you'll exist
a mile away and yous'll have their shoes.
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2-Apr-2005,09:xiii #3
Nikon Nikkor 65mm SW, f:four - Sharpness
Brian, I call back yous hit the nail on the caput. Looking at the GG it looks blurred at the edges - all effectually and I think it is a matter of the image circle. I used the lens on my Canham DLC45 with the regular bellows and there is no room for movements, merely I can focus the lens on infinity. I guess what that ways is cropping the epitome when priniting to eliminate the edge. I bought the lens at Midwest Photograph Commutation and in that location is zilch wrong with it that I tin come across - the glass is perfect. Exercise other 65mm users (no affair what brand) have that same experience? Only curious.
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2-Apr-2005,10:45 #iv
Beverly Hills, California
Nikon Nikkor 65mm SW, f:4 - Sharpness
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2-Apr-2005,10:46 #v
Nikon Nikkor 65mm SW, f:4 - Sharpness
Juergen, I avoided the 65mm Nikkor for that very reason. On the other hand, I take a Nikkor SW 75mm f/4.5 that performs wonderfully. I utilize it extensively for shooting interiors of homes and information technology has always delivered great results. You may desire to consider the extra 10mm in focal length equally a reasonable merchandise for the operation.
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2-Apr-2005,13:xix #six
Nikon Nikkor 65mm SW, f:4 - Sharpness
I have an older Schneider Super-Angulon 65/8 with an epitome circle rated fifty-fifty smaller than the Nikkor. The lens has a lot of light autumn-off and so I utilize it with print moving picture and I adjust the gradient in photoshop, just it is quite sharp out to the edge of the frame. I'thou happy with the lens.
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two-Apr-2005,xv:eleven #vii
Nikon Nikkor 65mm SW, f:4 - Sharpness
F32 and even F22 is way into difraction limits for a 65. Effort one at F11 on something flat and encounter if it is sharp without difraction equally an outcome.
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2-Apr-2005,20:48 #8
Nikon Nikkor 65mm SW, f:iv - Sharpness
I have doubts almost the hyothesis that unsharpness that Juergen is experiencing is due to diffraction. It sounds similar he is content with the sharpness at the heart but not at the edges. Softness from diffraction from stopping down too far would effect the entire image.
I haven't used a 65 mm lens, but I wouldn't be surprised if the basis glass image wide-open didn't hold up well to examination with a loupe. The coverage wide-open might not be 4x5. Nikon doesn't seem to publish MTF curves for their LF lenses -- for MTF curves for a comparable lens, look at http://www.schneideroptics.com/photo...ulon_56_65.pdf -- at f5.vi, the MTF curves fall off pretty steeply off-axis. Schneider gives the image circle wide-open as but 135 mm bore. Of course, this isn't the Nikon that was asked nearly, but the techology is similar and the Schneider information gives a feel for the expected performance.
When I had a Canham DLC, I constitute wide-angle lenses difficult to use. This was earlier a pocketbook bellows was available. Applying any rise would cause the front standard to tilt. I suggest carefully checking the parallelism of the standards, whether or not rise is used.
Besides, did you remove the modest screw on the back of the shutter? If left, this spiral will cause the shutter to be tilted on the lensboard.
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iii-Apr-2005,05:18 #nine
Nikon Nikkor 65mm SW, f:4 - Sharpness
http://www.europe-nikon.com/specifications.aspx?countryid=twenty&languageid=22&prodId=516&catId=148
Wide open 110mm.
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3-Apr-2005,06:38 #x
Nikon Nikkor 65mm SW, f:4 - Sharpness
Give thanks Yous all for your responses. I also doubt that this is a difraction issue, merely I will do more tests with the lens. I will shoot another badge of film in various "staged" prepare-ups and see how the lens performs. The image circle for the lens is indeed 110 fully open and 170 at f22. That would explain the blurriness on the GG when viewing wide open up. I will written report back with my examination results.
Juergen
Source: https://www.largeformatphotography.info/forum/showthread.php?13057-Nikon-Nikkor-65mm-SW-f-4-Sharpness
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