my new toy

[bressong]

I believe the bokeh of a photo is matter of optic design/scene/background/light contrast...

not an easy answer to tell

[bressong]

the favorite one of this week

[bressong]

f2

[Birna Rørslett]

So, one of them is the 28/2?

[bressong]

So, one of them is the 28/2?

Nikkor 50/2 Ai

[bressong]

f2 full open

[MEPER]

There was recent a thread about "Leica look". As I both have the vintage Nikkor 50/2 and Summicron 50/2 then it was the idea to compare the two lenses.
The Nikkor is about 50 - 80 USD on the used marked?  and Summicron maybe 500 - 1000 USD?
It is my guess that the optical difference between the two lenses does not reflect the price difference. But I have not yet had time to perform the test.

[bressong]

There was recent a thread about "Leica look". As I both have the vintage Nikkor 50/2 and Summicron 50/2 then it was the idea to compare the two lenses.
The Nikkor is about 50 - 80 USD on the used marked?  and Summicron maybe 500 - 1000 USD?
It is my guess that the optical difference between the two lenses does not reflect the price difference. But I have not yet had time to perform the test.

indeed, the 50/2 is 6glass in 4 group, it's similar to early time summicron 50/2

I am very curious of the test from your nikkor 50/2 and leica summicron 50/2

[Roland Vink]

hello NG, this is my first topic here

anyone can guess that what lense they are

The lenses have an aperture of f/2, or maybe f/1.8 due to the position of the aperture indexing (AI) ridge.

Both are true AI lenses, due to the presence of the lens speed post at 7 o'clock position. AI converted lenses don't have this feature so they are not AI converted.

Both also have a thinner extension on top of the lens speed post, designed to give some protection to the rear element. That rules out the AI 85/2 and 35/2.

The one on the left has 5 screws in the mount and a very thick rear lens protector, both features of early AI lenses. The one on the right has only three screws and thinner rear protectors, so is a later AI lens.

The second picture shows the DOF scale. The one on the left has the coloured scale above the chrome ring and under the focus ring. The one on the right has the DOF scale on the chrome ring, usually found on later AI and AIS lenses. I note that this one also has an aperture coupling prong made of pressed sheet metal, the other is milled from solid metal. However, on the first picture both are milled from solid metal, so either the prong on the right was swapped or it is a different lens.

I would say the one on the left is an early AI 50/1.2 (I meant 50/2) and the right one is an AI (not AIS) 50/1.8

[Alaun]

Well, from the second picture it is quite obvious, that the left one is 2.0

[Ian Watson]

What about the one on the right? If it is a 24mm f/2.8 then I could still win half a jelly baby 

[bressong]

The lenses have an aperture of f/2, or maybe f/1.8 due to the position of the aperture indexing (AI) ridge.

Both are true AI lenses, due to the presence of the lens speed post at 7 o'clock position. AI converted lenses don't have this feature so they are not AI converted.

Both also have a thinner extension on top of the lens speed post, designed to give some protection to the rear element. That rules out the AI 85/2 and 35/2.

The one on the left has 5 screws in the mount and a very thick rear lens protector, both features of early AI lenses. The one on the right has only three screws and thinner rear protectors, so is a later AI lens.

The second picture shows the DOF scale. The one on the left has the coloured scale above the chrome ring and under the focus ring. The one on the right has the DOF scale on the chrome ring, usually found on later AI and AIS lenses. I note that this one also has an aperture coupling prong made of pressed sheet metal, the other is milled from solid metal. However, on the first picture both are milled from solid metal, so either the prong on the right was swapped or it is a different lens.

I would say the one on the left is an early AI 50/1.2 and the right one is an AI (not AIS) 50/1.8

NG is really a place gathering same hobby people here.

when I post the first game picture, I am not aware the 3 screws one is such complicated.

I should updolad the photo again in right direction

[bressong]

Well, from the second picture it is quite obvious, that the left one is 2.0

correct, it's a original Nikkor 50/2 Ai

[bressong]

now let's open the envelope.

the 5 screws copy is original Nikkor 50/2 Ai (35xxxxx), every aspect meet the Ai design: milled metal rabbit ear, 5 screw, no milled slot as Ais
the 3 screws copy is original Nikkor 50/1.8 Ai (18xxxxx), typically that AiS nikkor lens had the 3 screws, but this Ai50/1.8 only had 3 screws(I don't know why), other aspect meet the Ai design

both of them are my favorite lenses, I got several various copies of 50/1.8 earlier, recently got the 50/2 by curiosity after I read 50/2 paper in Nikon's "the thousand and one nights".

when I compare fully open image quality of nikon's Ai50/1.8 vs AIS 50/1.4 & AFD 50/1.4, I think 50/1.8 is better @f1.8, any 50/1.8 is smaller and lighter. but 50/1.8 is not very good at corner when fully open, center is good.

now I can make a test of 50/1.8 and 50/2, who is better, I will post later

[Roland Vink]

the 3 screws copy is original Nikkor 50/1.8 Ai (18xxxxx), typically that AiS nikkor lens had the 3 screws, but this Ai50/1.8 only had 3 screws(I don't know why), other aspect meet the Ai design

Early AI lenses have 5 screw in the mount, but after about a year of production, most lenses up to 85mm reduced to 3 screws (probably to reduce production costs).

The AI 50/1.8 is one of my favourite lenses - background blur is smoother than most other 50mm Nikons. The 7-blade aperture gives blurs a nicer shape in most situations than the 6-blade aperture of the 50/2. Sharpness is about the same.