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50mm

30/09/2009 - 4:11 PM



Unique views 244 (304)

Have you ever used a 50mm lens? Have you ever used 35mm film? I guess the answer may depend on when you were bitten by the photography bug.

Once, the almost prescribed method of starting photography was with a 35mm camera fitted with a 50mm lens. It’s a road I walked down, and 28 years later, I still have that camera and lens combination (though I don’t use it much). How did we get to that point and, more importantly, why did we ever leave it behind?

The 50mm lens became known as the standard lens, not because it was standard fitment on 35mm cameras, but because it had neither a telephoto or wide angle effect on the perspective of an image. This occurs when the diagonal dimensions of the image frame match the focal length of the optic used. The mathematicians amongst you are by now scratching your heads as, with vertical height of 24mm, and a horizontal length of 36mm, the Hypotenuse is 43.26mm. Which means the standard lens on a 35mm camera should be 43mm. So where has the extra seven millimetres come from?

The 50mm lens became the standard lens by accident. Oskar Barnack, the man who invented the Leica camera that popularised 35mm photography, found that the only lens available to cover the 35mm format and deliver acceptably sharp images used a 50mm focal length. This established a convention and a rather good one too.

The optical formulation required to produce a good 50mm lens is rather straight forward. This means the lens can delivery high quality and fast apertures economically. Having a rather convenient field of view added to its popularity, and this was cemented by its almost universal adoption amongst 35mm camera manufacturers. Once it was almost impossible to buy a 35mm camera without a 50mm lens.

But by the mid eighties, things were changing. The age of the cheap zoom lens had arrived. In its place came the 35mm~70mm zoom lens. They didn’t have the quality of the 50mm lens. Neither could they match it for speed. But when it came to convenience they had it beaten. Convenience ruled, as cameras became more and more like consumer items, and less like exotic tools.

So why would you want to go back to the humble 50mm lens? Almost all 50mm lenses offer outstanding optical quality. Fast examples are not particularly expensive either, facilitating low light photography. And there is that field of view. Walk a few steps forward, or backwards, move to the left or the right. Having the single focal length makes you concentrate more on composition, and your perspective. Use one for a period of time, and your compositions will almost certainly improve.

If you don’t already have a 50mm lens, they are a very affordable purchase, especially second hand. Don’t dismiss a manual focus example either. It will likely have hyper focal distance markings, be of all metal construction and use pure glass optics…

And cost just a few pounds.

Tags: , 35mm, 50mm, Film, Lens, Standard

Comments

riprap007
riprap007  91568 forum posts England37 Constructive Critique Points
30 Sep 2009 - 7:43 PM

posted something similar in my blog recently. Just wish my f2.8 28mm was a f1.8 or similar like my 50mm! Glad someone else misses not having distance markings on too!

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User_Removed
2 Oct 2009 - 3:22 PM

The 50mm lens/35mm camera was always the standard for anyone beginning in photography but since the zooms came, along with autofocus, most people didnt even look at their 50mm lens.

Used the combination for many years throughout my teens, and early twenties until i bought an EOS, along with zooms.

Its odd but just lately i have been using a 55mm lens on my 350d for my shrooms and landscape images, something i never usually do, although i must add that its the much hated kit lens im using, but i dont mind the faults.

conrad
conrad e2 Member 910870 forum postsconrad vcard 116 Constructive Critique Points
20 Oct 2009 - 2:29 PM


Quote: Have you ever used a 50mm lens? Have you ever used 35mm film?

Yes to both! And my current 50mm lens is still one of my favourites.

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