NikonGear'23

Gear Talk => Lens Talk => Topic started by: dibyendumajumdar on December 17, 2022, 00:02:11

Title: Manual telephoto/zoom lenses without infra-red correction
Post by: dibyendumajumdar on December 17, 2022, 00:02:11

Hi,

I was wondering which of the manual era Nikkors had correction extending up to infra-red - thus requiring no correction in focus.

I think the pre IF 300mm f4.5 ED was one of those lenses.
Any others? Was the 180-600mm also corrected thus?

Regards

Title: Re: Manual telephoto/zoom lenses without infra-red correction
Post by: Matthew Currie on December 17, 2022, 07:12:22

I don't know which might be, but I have two you can scratch from the search.  The 400/5.6ED (the pre-IF one) definitely requires correction.  The dot on the 500/4P is so tiny and dim that if you don't have the instructions to tell you to use it you might miss it.  But it's there.

Title: Re: Manual telephoto/zoom lenses without infra-red correction
Post by: Akira on December 17, 2022, 09:04:52

According to this revew, the non-IF 300/4.5 ED is well corrected for IR, but performs poorly at distant scenes.

http://www.naturfotograf.com/lens_tele.html

That said, as you would already know, the amount of focus shift will vary significantly according to the wavelength of IR.  For example, the amount of focus shift with a 900nm IR-pass filter on my Nikkor 28/3.5 required almost twice as much amount of compensation as a 720nm filter did, measured by the rotation angle of the focus ring.

So, the correction may not help depending on the density of the IR filter.  Of course, with a mirrorless body, such a concern is non-existent.  :)

Title: Re: Manual telephoto/zoom lenses without infra-red correction
Post by: MEPER on December 17, 2022, 10:01:25

The 400/5.6 IF-ED also has a red dot.

The mirror lenses has no red dot. Some call them a poor-mans ED or APO lens. Don't know how they perform with IR.

Zeiss made for Hasselblad two tele lenses they called "Super-Achromat". A 250mm and a 350mm. With adapter they will work on a Nikon body.
Maybe they are cheap on ebay?

I remember Hasselblad wrote that even if light is IR or UV no focus compensation was needed on the focus screen.

Not very cheap but not impossible to get either:
https://www.ebay.com/itm/304582604379 (https://www.ebay.com/itm/304582604379)

Older versions exists which are probably much cheaper.

I wonder how well corrected the new Z-teles are?

Title: Re: Manual telephoto/zoom lenses without infra-red correction
Post by: MEPER on December 17, 2022, 10:10:10

The older 250mm is this one:
https://www.clubhasselblad.com/museum/special-zeiss-sonnar-superachromat-156250mm-lens (https://www.clubhasselblad.com/museum/special-zeiss-sonnar-superachromat-156250mm-lens)

I remember the MTF-lines for this lens looked very nice.
Many years ago I was close to buy a used one as I had a Nikon adapter for it and I also had a Hasselblad body.
Used price at that time was abut $3000

Title: Re: Manual telephoto/zoom lenses without infra-red correction
Post by: MEPER on December 17, 2022, 10:26:45

Specification for the 250 is here:
https://www.zeiss.com/content/dam/consumer-products/downloads/historical-products/photography/hasselblad-c/en/datasheet-zeiss-sonnar-superachromat-56250-en.pdf (https://www.zeiss.com/content/dam/consumer-products/downloads/historical-products/photography/hasselblad-c/en/datasheet-zeiss-sonnar-superachromat-56250-en.pdf)

Maybe MTF's is not that good compared with todays standards.