Nikon 28-300 vs 70-300 FX lenses FOV

Started 4 months ago | Discussions
rich9911 New Member • Posts: 9
Nikon 28-300 vs 70-300 FX lenses FOV

I'm comparing these two lenses and I see that the FOV at full zoom is different.

I kind of assumed two 300mm lenses would give the same FOV or magnification?

These are both FX lenses on a D750.

Ken Rockwell's reviews don't quote Fov of the 70-300. The 28-300 is quoted as 74-8.2 degrees.

Am I missing something?

Nikon D750
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FrancoD Forum Pro • Posts: 14,018
Re: Nikon 28-300 vs 70-300 FX lenses FOV
1

Try the same test at infinity, that is where both lenses should give you the same 300mm FOV.

BTW, just for fun as I don't have those lenses, is the FOV of the 28-300mm, at 300mm , close to that of the other on 250mm at the closer distances ?

OP rich9911 New Member • Posts: 9
Re: Nikon 28-300 vs 70-300 FX lenses FOV
1

FrancoD wrote:

Try the same test at infinity, that is where both lenses should give you the same 300mm FOV.

BTW, just for fun as I don't have those lenses, is the FOV of the 28-300mm, at 300mm , close to that of the other on 250mm at the closer distances ?

I'll try that tomorrow as its dark here now. My initial test was on a subject only 5m away.

I'd say that at about 250mm the 70-300 matches the 28-300 at 300... yes.

FrancoD Forum Pro • Posts: 14,018
Re: Nikon 28-300 vs 70-300 FX lenses FOV

They should start to match at around 10 m or so.

OP rich9911 New Member • Posts: 9
Re: Nikon 28-300 vs 70-300 FX lenses FOV

FrancoD wrote:

They should start to match at around 10 m or so.

That's interesting! So if the FOV reduced by the focusing?

FrancoD Forum Pro • Posts: 14,018
Re: Nikon 28-300 vs 70-300 FX lenses FOV
4

It has to do with how some lenses focus closer.

Doing so , some move a group of lens elements forward internaly rather than just extending the front element but by doing so they lose field of view.

I noticed that many years ago when Tamron came out with their first 28-200mm. At the close range it had the FOV of a 135mm lens.

The term used for it now is "focus breathing" .

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