I have a 52mm hood for 50mm lenses, 35mm format, which I want to fit on my Nikkor-W 150mm for 4x5. Am I right to assume that there will be no vignetting and that the two formats are compatible as they are the same focal length?
A 50mm lens and a 150mm lens don't have the same focal length.
In this case Focal length is irrelevant it's the "Angle of View" that's important.
Ian
...which differs with focal length. Six of one and a half dozen of the other.
Simplified:
angle = 2 * arctan(d/(2*f))
I think you've missed the point Ralph. He's comparing different film formats, a a 150mm on 5x4 camera has a slightly wider angle of view than a 50mm on a 35mm camera, I use a 150mm on my 10x8 and that's even wider still.
Ian
He wants to know if a lens hood for a 50mm Nikon SLR is OK on his 150mm Nikkor-W (5x4) lens without vignetting, that's unlikely if he uses any movements.
Ian
I think it's pretty clear that Ian understands the question, even if it's stated imprecisely...
...Try it, and it might work, but it might vignette if you use movements...
You are still neglecting the difference in format, so your comments are totally incorrect
A Nikkor f1.8 50mm lens on a 35mm camera has an angle of coverage (diagonal) of 46° Nikons own figure, while they state Dead Link Removed f5.6 150mm to be 60° at full aperture and 70° at f22.
That's rather at odds with your comment and in fact the total opposite, it's why I use a lens hood designed for a 28mm SMC Pentax Takumar (35mm camera) on my 150mm Sironar and it's an excellent combination.
So in view of the figures I think the OP should really look for a wider lens hood. The 150mm Nikkor W is closer in equivalence to a 38-40mm lens on a 35mm camera.
Ian
Ian
My fault, you are correct. I recently had my brain serviced, and I don't think they put it back together right. The equation, posted by myself earlier proves your point too.
Nevertheless, you and David said that camera movements were an issue. Why do you think that? The hood is moving with the camera. Either the hood is in the way or it isn't. Camera movements should have nothing to do with it.
It's those German brain surgeons Ralph
As the lens is shifted (up, down, left or right)you are using light from a more oblique angle, almost as if using a much wider angle lens, so the edges of the lens hood on that are furthest from off centre is likely to vignette.
In Krzys case that would probably happen rather quickly with his 50mm lens hood on the 150mm assuming it's not vignetting without movements.
Ian
Ian
My fault, you are correct. I recently had my brain serviced, and I don't think they put it back together right. The equation, posted by myself earlier proves your point too.
Hopefully you got a full 90 day guarantee for parts and labor?
Sandy King
No. The receipt said 'no fault found'.
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