Author Topic: How to get non-AI Nikkors converted?  (Read 65870 times)

f4-fan

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Re: How to get non-AI Nikkors converted?
« Reply #105 on: January 14, 2020, 06:43:38 »
If you don't want to do it yourself, take the aperture ring off as Asle said, and send it to Marcel Van Engen - he is a member here (MarcelvanEngen). His website is here:

https://magnimopus.com/services/

He can do a professional AI conversion which preserves the original appearance of the lens. While home AI conversions may be functional (assuming you file the aperture ring correctly) many are quite ugly and may reduce the resale value.

Thats just the information, I need  :)
I will contact him...
Thanks
Ralf
Leverkusen, NRW, Germany
"Camera Moralia - Digicams for Social Justice!" - an initiative of https://www.fotogemeinschaft.de .

MarcelvanEngen

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Re: How to get non-AI Nikkors converted?
« Reply #106 on: January 17, 2020, 17:25:42 »
Thank you Roland. :D
And thanks Ralf for reaching out to me. Glad you are not opting for the hack, cut, file method yourself.
These lenses are beautifully made and to see some of the ugly diy jobs just  :'(

f4-fan

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Re: How to get non-AI Nikkors converted?
« Reply #107 on: January 17, 2020, 19:33:22 »
Thank you Roland. :D
And thanks Ralf for reaching out to me. Glad you are not opting for the hack, cut, file method yourself.
These lenses are beautifully made and to see some of the ugly diy jobs just  :'(

On the one hand, I don't have suitable tools, on the other hand, I would be afraid that iron shavings would come onto the lenses.

I am very excited to see how well the adapted Micro Auto works on the D850.
Will it be better than the AF Micro 55mm 2.8 ? (a cheap Alternative)

On the Canon 5D MK 2+3 I had extremly sharp macros with the Micro Auto and a cheap chinese adapter...

Ralf
Leverkusen, NRW, Germany
"Camera Moralia - Digicams for Social Justice!" - an initiative of https://www.fotogemeinschaft.de .

Roland Vink

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Re: How to get non-AI Nikkors converted?
« Reply #108 on: January 19, 2020, 21:44:44 »
Be aware that Micro-Nikkor Auto 1:3,5 f=55mm no 190605 is a "compensating" lens. It was designed for use with an external light meter at a time when cameras did not have through-the-lens (TTL) light meters. When the lens is stopped down to f/5 and smaller, as the lens is focused close, the aperture opens to compensate for the light that would usually be lost due to extension (bellows factor). At the 1:2 setting the aperture opens a full stop compared to infinity. Compensation is obviously not possible when the lens is used at wider apertures since the lens cannot open wider than full aperture as the lens is focused closer.

Compensation was very convenient for cameras without TTL metering since they didn't need to adjust the shutter speed or aperture when focusing at different distances.  However, for cameras with TTL meters, you need to counter-compensate since the TTL meter automatically compensates for light lost due to extension. That is why in the late 1960s when TTL metering was common, the original 55 micro was replaced with the Micro-Nikkor-P without compensation. If you intend to use TTL meters, the non-compensating versions are much more convenient.

Will it be better than the AF 55 micro? The original 55 micro has a reputation for being very good at close range (not so good at infinity), but the newer lens has much better coatings for improved contrast, and it has floating elements so it should perform well at any distance. Manual handling of the AF lens is perhaps not so nice due to the narrow plastic focus ring.

Birna Rørslett

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Re: How to get non-AI Nikkors converted?
« Reply #109 on: January 19, 2020, 22:10:59 »
--- Manual handling of the AF lens is perhaps not so nice due to the narrow plastic focus ring.

The understatement of the day :)

The AF 55 is a rattling affair with no love lost to it.

f4-fan

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Re: How to get non-AI Nikkors converted?
« Reply #110 on: January 19, 2020, 22:13:21 »
Be aware that Micro-Nikkor Auto 1:3,5 f=55mm no 190605 is a "compensating" lens. It was designed for use with an external light meter at a time when cameras did not have through-the-lens (TTL) light meters. When the lens is stopped down to f/5 and smaller, as the lens is focused close, the aperture opens to compensate for the light that would usually be lost due to extension (bellows factor). At the 1:2 setting the aperture opens a full stop compared to infinity. Compensation is obviously not possible when the lens is used at wider apertures since the lens cannot open wider than full aperture as the lens is focused closer.

Compensation was very convenient for cameras without TTL metering since they didn't need to adjust the shutter speed or aperture when focusing at different distances.  However, for cameras with TTL meters, you need to counter-compensate since the TTL meter automatically compensates for light lost due to extension. That is why in the late 1960s when TTL metering was common, the original 55 micro was replaced with the Micro-Nikkor-P without compensation. If you intend to use TTL meters, the non-compensating versions are much more convenient.

Will it be better than the AF 55 micro? The original 55 micro has a reputation for being very good at close range (not so good at infinity), but the newer lens has much better coatings for improved contrast, and it has floating elements so it should perform well at any distance. Manual handling of the AF lens is perhaps not so nice due to the narrow plastic focus ring.

Thanks for your hints. Compensation of this lens should not be so problematic, because  I can use bracketing. I will never use this lens for high speed photography  ;)

By the way: One can use it also for 'rather sharp' portraits (Micro-Nikkor Auto 1:3,5 f=55mm with Canon 5D MK 3):




 
Ralf
Leverkusen, NRW, Germany
"Camera Moralia - Digicams for Social Justice!" - an initiative of https://www.fotogemeinschaft.de .

Birna Rørslett

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Re: How to get non-AI Nikkors converted?
« Reply #111 on: January 19, 2020, 22:59:52 »
It's not difficult to remove the internal cam that does the compensation of aperture ... Once removed, you can use the lens in a straightforward manner.