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Question About Canon EF-S 18-55 Lens  
User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 6
Posted (8 years 9 months 2 weeks 3 days 11 hours ago) and read 5657 times:

Hi.
As some here might know I bought a Canon EOS 350D last week with the EF-S 18-55 kit lens. Today I got told due to the fact EF-S lens there is no (how is it called) factor of 1,6. Is this true? Does it really use the true 18-55mm and not as I thought 28,8-88mm. Any help is welcome.
Thanks.
Georg

17 replies: All unread, jump to last
 
User currently offlineRuudOnline From Netherlands, joined Feb 2006, 82 posts, RR: 0
Reply 1, posted (8 years 9 months 2 weeks 3 days 11 hours ago) and read 5651 times:

It acts as 28-88mm lens. The "S" in EF-S stands for "Short back focus".

Ruud


User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 6
Reply 2, posted (8 years 9 months 2 weeks 3 days 10 hours ago) and read 5644 times:

Quoting RuudOnline (Reply 1):

Thanks. I thought so. Will tell my friend that he told me the wrong thing.

Georg


User currently offlineJumboJim747 From Australia, joined Oct 2004, 2465 posts, RR: 44
Reply 3, posted (8 years 9 months 2 weeks 3 days 5 hours ago) and read 5610 times:

Quoting Jorge1812 (Thread starter):
there is no (how is it called) factor of 1,6. Is this true?

The crop factor has nothing to do with the lens .
The crop factor is an in camera sensor feature and not a lens feature
Cheers



On a wing and a prayer
User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 6
Reply 4, posted (8 years 9 months 2 weeks 3 days 3 hours ago) and read 5586 times:

Quoting JumboJim747 (Reply 3):
The crop factor is an in camera sensor feature and not a lens feature

That's what I thought but I got told the other way today. Now I know better!

Thanks!

Georg


User currently offlineSllevin From United States of America, joined Jan 2002, 3376 posts, RR: 6
Reply 5, posted (8 years 9 months 2 weeks 3 days 2 hours ago) and read 5577 times:

An EF-S lens eliminates the crop issue. An 18-55 EF-S lens will function as an 18-55.

You get the crop issue when you mount EF lenses on your camera.

I'm not arguing that full sensor (like the 5D) DSLR's are the wave of the future and EF-S will likely pass on with age. But it DOES fill the same purpose by allowing you to hit the full sensor.

Steve


User currently offlineStaffan From , joined Dec 1969, posts, RR:
Reply 6, posted (8 years 9 months 2 weeks 2 days 18 hours ago) and read 5568 times:

Quoting Sllevin (Reply 5):
An EF-S lens eliminates the crop issue. An 18-55 EF-S lens will function as an 18-55.

You get the crop issue when you mount EF lenses on your camera.

Wrong. Read above.

Quoting RuudOnline (Reply 1):
It acts as 28-88mm lens. The "S" in EF-S stands for "Short back focus".



Quoting JumboJim747 (Reply 3):
The crop factor has nothing to do with the lens .
The crop factor is an in camera sensor feature and not a lens feature


User currently offlineJorge1812 From Germany, joined Apr 2004, 3149 posts, RR: 6
Reply 7, posted (8 years 9 months 2 weeks 2 days 15 hours ago) and read 5543 times:

Searched the Canon Website and found that

The EF-S 18-55mm f/3.5-5.6 is a standard zoom lens specifically designed for the EOS 300D digital SLR. Its effective focal length is equivalent to 29-88mm in 35mm film format.

29-88mm is true so the crop factor works on this one too.

http://www.canon-europe.com/For_Home...onentID=52477&SourcePageID=26341#1

Georg


User currently offlineSean377 From United Kingdom, joined Mar 2001, 1225 posts, RR: 40
Reply 8, posted (8 years 9 months 2 weeks 2 days 5 hours ago) and read 5510 times:

Until we are told otherwise (by the manufacturers), all SLR lens focal lengths are quoted in the 35mm full frame format, as most above have correctly stated.


Flying is the second greatest thrill known to man... Landing is the first!
User currently offlineKukkudrill From Malta, joined Dec 2004, 1123 posts, RR: 4
Reply 9, posted (8 years 9 months 2 weeks 2 days 3 hours ago) and read 5498 times:

Quoting Sean377 (Reply 8):
Until we are told otherwise (by the manufacturers), all SLR lens focal lengths are quoted in the 35mm full frame format

Lens focal length has nothing to do with sensor/frame size and won't change if you mount the lens on a camera with a smaller sensor. The only thing that would change is the image perspective produced by the smaller sensor, and this is what the crop factor is meant to indicate. My old Olympus C-740 has a focal length of 6.3 to 63mm which is quoted as equivalent to 38-380mm on a 35mm camera because the Olympus has such a tiny sensor, but supposing I could somehow detach the lens and mount it on a 35mm SLR the focal length would remain 6.3-63mm.



Make the most of the available light ... a lesson of photography that applies to life
User currently offlineSean377 From United Kingdom, joined Mar 2001, 1225 posts, RR: 40
Reply 10, posted (8 years 9 months 2 weeks 1 day 18 hours ago) and read 5474 times:

Quoting Kukkudrill (Reply 9):
Lens focal length has nothing to do with sensor/frame size and won't change if you mount the lens on a camera with a smaller sensor. The only thing that would change is the image perspective produced by the smaller sensor, and this is what the crop factor is meant to indicate. My old Olympus C-740 has a focal length of 6.3 to 63mm which is quoted as equivalent to 38-380mm on a 35mm camera because the Olympus has such a tiny sensor, but supposing I could somehow detach the lens and mount it on a 35mm SLR the focal length would remain 6.3-63mm.

That's why I specifically said SLR lenses.



Flying is the second greatest thrill known to man... Landing is the first!
User currently offlineKukkudrill From Malta, joined Dec 2004, 1123 posts, RR: 4
Reply 11, posted (8 years 9 months 2 weeks 1 day 8 hours ago) and read 5462 times:

I understood you as implying that the lens focal length varies depending on the sensor format, which is not the case either for DSLRs or compacts.  Smile


Make the most of the available light ... a lesson of photography that applies to life
User currently offlineStaffan From , joined Dec 1969, posts, RR:
Reply 12, posted (8 years 9 months 2 weeks 1 day 8 hours ago) and read 5458 times:

Quoting Sean377 (Reply 8):
Until we are told otherwise (by the manufacturers), all SLR lens focal lengths are quoted in the 35mm full frame format, as most above have correctly stated.

No, their real focal length is what's marked. As said, it has nothing to do with 35mm full frame, 1.6 crop or medium format.


User currently offlineSean377 From United Kingdom, joined Mar 2001, 1225 posts, RR: 40
Reply 13, posted (8 years 9 months 2 weeks 1 day 6 hours ago) and read 5439 times:

Chaps, I'm agreeing with you here, but we are mis-understanding each other.

I was responding to the original posters question when he was uncertain whether or not the focal length/range of EF-S lenses are adjusted and quoted specifically for the cameras for which they are made.

Or put simply, an EF-S 18-55mm would give the same field of view as an EF 18-55mm (if there was one available) when mounted on a 350D, i.e. the EF-S 18-55mm is not relabelled an EF-S 28-90mm, which I think was the original question!

Phew! Complicated or what?

Sean



Flying is the second greatest thrill known to man... Landing is the first!
User currently offlineMartinairYYZ From Canada, joined Nov 2003, 1209 posts, RR: 7
Reply 14, posted (8 years 9 months 2 weeks 22 hours ago) and read 5407 times:

It doesn't stay as an 18-55.... it is multipled by 1.6x due to the size of the camera sensor, not dependant on the lens itself.

Overall it is a nice lens for beginners, and provides a good zoom range for everyday shooting  Smile

Martin



Chelsea Football Club supporter.
User currently offlineMattbna From United States of America, joined Dec 2003, 316 posts, RR: 7
Reply 15, posted (8 years 9 months 1 week 5 days 22 hours ago) and read 5340 times:

Quoting Jorge1812 (Reply 7):
The EF-S 18-55mm f/3.5-5.6 is a standard zoom lens specifically designed for the EOS 300D digital SLR.

...and will work on the 350D and the 20D as well.

I was actually surprised to see that Canon made the excellent 10-22mm an EF-S lens - eliminating the possibility of putting it on the 5D or even the good 'ole 10D.

I have had the 18-55mm lens for almost 2 years now and actually love the little thing... I wish the kit version of the lens was the USM model but you can't have it all when it is that cheap!  Smile


Matt



Canon EOS 7D & 40D -- 100-400mm L IS -- 70-200mm f/2.8L IS II -- 28-135mm IS -- 10-22mm -- 18-55mm EF-S
User currently offlineDC10Tim From United Kingdom, joined Jan 2005, 1406 posts, RR: 14
Reply 16, posted (8 years 9 months 1 week 5 days 12 hours ago) and read 5316 times:

Quoting Mattbna (Reply 15):
I have had the 18-55mm lens for almost 2 years now and actually love the little thing...

I don't know why it seems to get such a bad press. Personally I think it's a great little lens and have taken some lovely shots with it.

Tim.



Obviously missing something....
User currently offlineSulman From United States of America, joined Mar 2004, 2037 posts, RR: 32
Reply 17, posted (8 years 9 months 1 week 5 days 12 hours ago) and read 5311 times:

Quoting DC10Tim (Reply 16):
I don't know why it seems to get such a bad press. Personally I think it's a great little lens and have taken some lovely shots with it.

Because it's cheap. As you say, there's nothing wrong with it - you can get terrific results.



It takes a big man to admit they are wrong, and I am not a big man.
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