What's a "fixed" 2.8 lens mean? (Page 6): I won't look for my Canon then. I'll just look for my Nikon. :sm24:...

frankraney Loc: Clovis, Ca.

CHG_CANON wrote:

There are some rare lenses where both the aperture and focal length are 'fixed' in a nonchangeable way. None of the lenses in Canon's 30+ years of EOS technology are any of these rarities. The author of the advertising text that caught the attention of the OP failed at their task, as did everyone else involved in reviewing and approving that error before publication.

I won't look for my Canon then. I'll just look for my Nikon.

dbrugger25 Loc: Raleigh, NC

foathog wrote:

Canon has a refurb RF 100MM fixed 2.8 macro lens for sale. What do they mean my fixed? Maybe I'm not up on new terminology. It wouldn't be the first time

Harry

Does Fixed mean the same thing as Prime in reference to focal length? I have the EF version of that 100mm Macro lens and it has a fixed focal length but variable aprateur. I really like the lens for portraits as well as a macro lens.

foathog Loc: Greensboro, NC

Cheese wrote:

But they did mention the aperture range:

I didn't see that.

Tommg

it might be a "prime" lens

Bohica Loc: SE Coast of NC

mwsilvers wrote:

A "fixed" aperture lens refers to a zoom lens where the widest aperture, say f/2.8, is available throughout the entire focal length range. The word "fixed" is irrelevant on a prime lens where there is only one focal length. It was probably simply an error made by whomever wrote the text.

The term fixed lense usually means the lens is not interchangeable. Most rangefinders came with a fixed 45 or 50mm fixed lens. for telephoto or wide angle you had to purchase auxillary lenses that screwed into the fixed lens. My Contessa LK has a Zeiss 50mm 2.8 fixed lens.

Nevergone

2.8 also means it's a fast Lens comparer to à 5.6

Bill_de Loc: US

Bohica wrote:

The term fixed lense usually means the lens is not interchangeable. Most rangefinders came with a fixed 45 or 50mm fixed lens. for telephoto or wide angle you had to purchase auxillary lenses that screwed into the fixed lens. My Contessa LK has a Zeiss 50mm 2.8 fixed lens.

Not quite. Typically a fixed lens means you can't change the focal length. It doesn't matter if the lens is permanently attached to the camera body or interchangeable. You might be interested in this.

https://www.kentfaith.com/blog/article_what-is-a-fixed-camera-lens_5441

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Bohica Loc: SE Coast of NC

Bill_de wrote:

Not quite. Typically a fixed lens means you can't change the focal length. It doesn't matter if the lens is permanently attached to the camera body or interchangeable. You might be interested in this.

https://www.kentfaith.com/blog/article_what-is-a-fixed-camera-lens_5441

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the term fixed lens has been around longer than variable focal lengths

Bill_de Loc: US

Bohica wrote:

the term fixed lens has been around longer than variable focal lengths

Did you click on the link I provided. You might find it worthwhile.

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Bohica Loc: SE Coast of NC

Bill_de wrote:

Did you click on the link I provided. You might find it worthwhile.

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I did, and do not agree!

tshift Loc: Overland Park, KS.

Bohica wrote:

The term fixed lense usually means the lens is not interchangeable. Most rangefinders came with a fixed 45 or 50mm fixed lens. for telephoto or wide angle you had to purchase auxillary lenses that screwed into the fixed lens. My Contessa LK has a Zeiss 50mm 2.8 fixed lens.

Wrong!

tshift Loc: Overland Park, KS.

Bill_de wrote:

Did you click on the link I provided. You might find it worthwhile.

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BebuLamar

tshift wrote:

According to the instruction manual if you set the aperture at f/2.8 and focus to 1:1 the effective aperture is f/5.6.

ken.toda

I think it means NOT ZOOM. Today, majority of SLR(DSLR) lenses are ZOOM. The period before 1970, there was hardly any zoom lenses and if any, the image quality were so poor. Even TODAY zoom lens can not reproduce all four corners in perfect square. Look through and shoot window or door frame at maximum focal length then minimum.
They usually bend different ways. Macro or Micro lenses are so sharp and corrected like enlarger lenses. Zoom lenses are not, they shoot like machine gun while macro/micro lens shoot like accurate sniper.

jerryc41 Loc: Catskill Mts of NY

Six pages. That must be a complicated explanation. 😂