FAQ FAQ  Forum Search   Events   Register Register  Login Login

Reputable and arguable 50mm as normal

Page  <123
Author
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 9425
Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2019 at 22:40
I do not see like a 22-24mm lens. But the eye adapts to the situation,so,sometimes it is like a 24mm and at other times it is like a 85mm lens.

Old fixed lens rangefinder cameras usually are 40-45mm, not wider. Exotic compacts, like the Minolta TC1 were wider, but those were expensive cameras.

50mm became the standard as it was 1) cheap, 2) reasonably easy to make a good one and 3) without much distortion. It is not a wide and it is not (yet) tele. If it had been cheaper to make a 35mm lens, that could have been the standard lens. The rule of about the diagonal of the sensor makes sense as those focal lengths usually have not much distortion.
Why not follow me on Instagram? @Addy_101
 



Back to Top
sybersitizen View Drop Down
Senior Member
Senior Member

Joined: 04 August 2006
Country: United States
Location: California
Status: Offline
Posts: 14166
Post Options Post Options   Quote sybersitizen Quote  Post ReplyReply Direct Link To This Post Posted: 18 January 2019 at 23:54
Originally posted by addy landzaat addy landzaat wrote:

I do not see like a 22-24mm lens. But the eye adapts to the situation,so,sometimes it is like a 24mm and at other times it is like a 85mm lens.

Nobody sees like any particular lens except maybe some people with vision problems.
Back to Top
ADub128 View Drop Down
Senior Member
Senior Member

Joined: 19 May 2007
Country: United States
Location: South Bay L.A.
Status: Offline
Posts: 2109
Post Options Post Options   Quote ADub128 Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 00:28
I learned the "two eyes open" definition for normal lenses too where you get a 1x view of the world. But this can be impacted by the viewfinder magnification as pegelli mentioned.

It's OK to have multiple definitions for normal.

BTW, this "normal lens" thread pops up here at Dyxum from time to time, I think. I recall posting a response years and years ago in a similar thread.
NEX-3, 6 | A77ii | A700 | Dynax 505si super | Maxxum 9 | SRT-101 | many lenses! | Instagram: @ArtWong128
Back to Top
ADub128 View Drop Down
Senior Member
Senior Member

Joined: 19 May 2007
Country: United States
Location: South Bay L.A.
Status: Offline
Posts: 2109
Post Options Post Options   Quote ADub128 Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 00:35
One more take on this -- "normal" is that spot right in-between wide angle and telephoto. For APS-C and 35mm, it's about 50mm, give or take a few millimeters.
NEX-3, 6 | A77ii | A700 | Dynax 505si super | Maxxum 9 | SRT-101 | many lenses! | Instagram: @ArtWong128
Back to Top
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 9425
Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 01:15
Originally posted by sybersitizen sybersitizen wrote:

Originally posted by addy landzaat addy landzaat wrote:

I do not see like a 22-24mm lens. But the eye adapts to the situation,so,sometimes it is like a 24mm and at other times it is like a 85mm lens.

Nobody sees like any particular lens except maybe some people with vision problems.
it seems we are in agreement
Why not follow me on Instagram? @Addy_101
Back to Top
addy landzaat View Drop Down
Senior Member
Senior Member

Joined: 22 April 2006
Country: Netherlands
Location: Netherlands
Status: Offline
Posts: 9425
Post Options Post Options   Quote addy landzaat Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 01:16
Originally posted by ADub128 ADub128 wrote:

One more take on this -- "normal" is that spot right in-between wide angle and telephoto. For APS-C and 35mm, it's about 50mm, give or take a few millimeters.
50mm on APS-C is a tele.
Why not follow me on Instagram? @Addy_101
 



Back to Top
mirthseeker View Drop Down
Senior Member
Senior Member

Joined: 02 October 2011
Country: Australia
Location: Melbourne
Status: Offline
Posts: 684
Post Options Post Options   Quote mirthseeker Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 01:18
Originally posted by Phil Wood Phil Wood wrote:

I've always thought that 'normal' lenses have 'normal perpsective' in that they match normal eyesight in that respect.

I would tend to agree. In fact, I have inherited an 1895 Kodak box camera (medium - large format) that has a lens such that it provides "normal" perspective. I would hypothesize that one could go further back into photographic history and find that large format cameras that used glass plates had lenses that produced a "normal" perspective also. The concept of a 50mm lens being "normal", would have logically followed the adoption of 35mm film as common, and "full frame".

Edited by mirthseeker - 19 January 2019 at 01:25
Back to Top
Aavo View Drop Down
Senior Member
Senior Member

Joined: 03 April 2013
Country: Estonia
Location: Tallinn
Status: Offline
Posts: 5215
Post Options Post Options   Quote Aavo Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 09:25
These 2 mounted lenses are 50mm and 35mm, but can't see FL of other collection. Wider is probably only 1 lens in the right lower corner.

This shot from Vevey Photomuseum
a6500 & some nice e-mount lenses. Be fond of photography - this is the way to alleviate stress
Back to Top
waldo_posth View Drop Down
Alpha Eyes group
Alpha Eyes group

Joined: 01 August 2012
Country: Germany
Location: Potsdam
Status: Offline
Posts: 4174
Post Options Post Options   Quote waldo_posth Quote  Post ReplyReply Direct Link To This Post Posted: 19 January 2019 at 23:10
Strange that nobody so far checked the field of vision of the human eye: This wikipedia article gives some numbers for the different angles of view vertical/horizontal, up/down etc. Here is information about the angles of view depending on different IQs (2D vision, 3D vision, vision in focus etc.). The links are just examples - there is much more on the net.

My interpretation of the numbers:
-fisheye is normal because it corresponds to our total viewing angle (if we combine the separate [monocular] fields of view of the left and the right eye);
- 12-14mm is normal because it corresponds to the binocular peripheral viewing angle (2D vision);
- 35-40mm is normal because it corresponds to the field of vision sans periphery (3D vision);
- 85-90mm is normal because it corresponds to the field of vision in focus.

The good thing is that our human lenses come with a program for lens correction - so there is no distortion. It's even better: Since I am now relying for four years on spare parts (made, proudly to be mentioned, by Carl Zeiss) I noticed that the lens correction program works with them, too.
"Stare, pry, listen, eavesdrop. Die knowing something. You are not here long." (Walker Evans)   http://www.flickr.com/photos/waldo_posth/
Back to Top
Miranda F View Drop Down
Senior Member
Senior Member

Joined: 11 January 2014
Country: United Kingdom
Location: Bristol
Status: Offline
Posts: 3250
Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2019 at 09:03
Originally posted by QuietOC QuietOC wrote:

Compact film cameras didn't have very bright lenses either. f/1.7 seems to be as bright as they got and those were 40+ mm lenses. Fuji made a 24mm F1.9 film compact in 2001.


Interesting to note the Rollei 35 had a 40mm lens (f2.8 Sonnar or f3.5 Tessar) and I really liked the view angle of that. PLus the OVF was by far the best I've used on any small camera (and superior to most large ones).
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
Back to Top
Miranda F View Drop Down
Senior Member
Senior Member

Joined: 11 January 2014
Country: United Kingdom
Location: Bristol
Status: Offline
Posts: 3250
Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2019 at 09:04
Originally posted by sybersitizen sybersitizen wrote:

There is no lens of any kind that corresponds to how we see.

Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
Back to Top
Miranda F View Drop Down
Senior Member
Senior Member

Joined: 11 January 2014
Country: United Kingdom
Location: Bristol
Status: Offline
Posts: 3250
Post Options Post Options   Quote Miranda F Quote  Post ReplyReply Direct Link To This Post Posted: 22 January 2019 at 09:09
Originally posted by mirthseeker mirthseeker wrote:

Originally posted by Phil Wood Phil Wood wrote:

I've always thought that 'normal' lenses have 'normal perpsective' in that they match normal eyesight in that respect.

I would tend to agree. In fact, I have inherited an 1895 Kodak box camera (medium - large format) that has a lens such that it provides "normal" perspective.

That's an interesting point, and does make some sense. Tele lenses do seem to have a different perspective, in the sense of emphasizing the different planes, though this may be something to do with the relative aperture.

Wide angle lenses do seem to give a different perspective, which is part of their attraction. Not sure I find a scientific justification of either, though!
Miranda F & Sensorex, Sony A58, Nex-6, Dynax 4, 5, 60, 500si/600si/700si/800si, various Sony & Minolta lenses, several Tamrons, lots of MF primes and *far* too many old film cameras . . .
Back to Top
Dyxum main page >  Forum Home > Equipment forums > Lens Talk Page  <123

Forum Jump Forum Permissions View Drop Down



This page was generated in 0.047 seconds.

Monitor calibration strip

Dyxum.com - Home of the alpha system photographer

In memory of Cameron Hill - brettania

Feel free to contact us if needed.