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Occasional Contributor
Posts: 17
Registered: ‎02-14-2018
Accepted Solution

Canon 300mm f/2.8 mk1 non is

Hi gang it might be stupid question but here goes Can you still this lens with the front glass element missing ?

Respected Contributor
Posts: 1,851
Registered: ‎12-02-2012

Re: Canon 300mm f/2.8 mk1 non is

How did the front element come to be missing?

 

I am not familiar tith the non is version but the other one is very expensive. I wouldn't use one with no front element because you will get dust and dirt inside it. 

Scott

Canon 5d mk 4, Canon 6D, EF 70-200mm L f/2.8 IS mk2; EF 16-35 f/2.8 L mk. III; Sigma 35mm f/1.4 "Art" EF 100mm f/2.8L Macro; EF 85mm f/1.8; EF 1.4x extender mk. 3; EF 24-105 f/4 L; EF-S 17-55mm f/2.8 IS; 3x Phottix Mitros+ speedlites

Why do so many people say "FER-tographer"? Do they take "fertographs"?
Occasional Contributor
Posts: 17
Registered: ‎02-14-2018

Re: Canon 300mm f/2.8 mk1 non is

There's 1 on ebay going  cheap  other than the glass missing the lens is mint its being sold by a trusted seller  don't know if I  should go for it and whether i can get new glass

VIP
Posts: 9,556
Registered: ‎12-07-2012

Re: Canon 300mm f/2.8 mk1 non is

The answer is no it will not work.  The front glass is part of Lens Group 1.  Why would you even think Canon would put lenses in their lens that is doesn't need?

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
Occasional Contributor
Posts: 17
Registered: ‎02-14-2018

Re: Canon 300mm f/2.8 mk1 non is

ive been told that it is just a plain glass element NOT an optical element on the mk1?

VIP
Posts: 9,556
Registered: ‎12-07-2012

Re: Canon 300mm f/2.8 mk1 non is

"ive been told that it is just a plain glass element NOT an optical element on the mk1?"

 

It may be but I count 10 lenses in 8 groups.  That tells me it is needed.

EOS 1DX and 1D Mk IV, along with, a lot of other stuff.
Esteemed Contributor
Posts: 4,517
Registered: ‎06-25-2014

Re: Canon 300mm f/2.8 mk1 non is


@ABBOTALE wrote:

ive been told that it is just a plain glass element NOT an optical element on the mk1?


Even plain glass has a refractive index. Even if the element's only purpose was to have coatings painted on it, the rest of the lens may have had to account for its presence.

 

And why isn't the element there anyway? Doesn't its absence suggest that the lens has been dropped? So what other damage might there be? Unless you're a qualified lens repair person with considerable experience on Canon lenses, I think buying it would be a very risky proposition.

Bob
Boston, Massachusetts USA
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