How is this possible? I just read a review of the Canon 100-400mmL f4.5-5.6. This article stated that with a 1.4 extender the camera was 224-896mm. With a 2x extender it was...

will47 Loc: Indianapolis, IN

I just read a review of the Canon 100-400mmL f4.5-5.6.

This article stated that with a 1.4 extender the camera was 224-896mm.

With a 2x extender it was 320-1280mm. (probably no auto focus)

How

Camera 7D Mark ll

bleirer

Talking about crop camera probably. Applying a 1.6 crop factor.

CHG_CANON Loc: the Windy City

100 x 2 x 1.6 = 320

PHRubin Loc: Nashville TN USA

Terminology: The lens is still 100-400, but on a Canon APS-C body it gives the field of view of a 224-896 mm lens.

jeep_daddy Loc: Prescott AZ

will47 wrote:

I just read a review of the Canon 100-400mmL f4.5-5.6.

This article stated that with a 1.4 extender the camera was 224-896mm.

With a 2x extender it was 320-1280mm. (probably no auto focus)

How

Camera 7D Mark ll

What are you asking when you ask "how". Are you asking "how" can it be 320 to 1280 using the 2x or are you asking "how" can it be that it will autofocus with the 1.4 extender and not autofocus with the 2x extender.

My question to you is are you talking about the Canon 100-400mmL f4.5-5.6 version 1, or the Canon 100-400mmL f4.5-5.6 version 2. Because if you are talking about version 1, the push pull zoom, you don't want that one and it probably won't autofocus with either of the extenders.

100x1.6=160
400x1.6=640

100x1.6x1.4=224
400x1.6x1.4=896

100x1.6x2=320
400x1.6x2=1280

This is the field of view you get with a crop sensor using L series lenses.

will47 Loc: Indianapolis, IN

jeep_daddy wrote:

What are you asking when you ask "how". ... (show quote)

Thanks. I was speaking of V2.

bleirer

jeep_daddy wrote:

What are you asking when you ask "how". ... (show quote)

Version 1 is f5.6 on the long end same as version 2, no?

User ID

bleirer wrote:

Talking about crop camera probably. Applying a 1.6 crop factor.

Yes, clearly that combines both effects.

robertjerl Loc: Corona, California

will47 wrote:

Thanks. I was speaking of V2.

Doesn't matter the math is the same - I have owned and used both the version 1 and the mark 2 and used a 1.4x III on both lenses with 6D & 5DIV FF bodies and 7DII & 80D bodies. I haven't taken my new to me 90D out with the 100-400L yet.

jeep_daddy Loc: Prescott AZ

bleirer wrote:

Version 1 is f5.6 on the long end same as version 2, no?

Yes...but the V2 is MUCH sharper than the V1

wmurnahan Loc: Bloomington IN

PHRubin wrote:

Terminology: The lens is still 100-400, but on a Canon APS-C body it gives the field of view of a 224-896 mm lens.

Agree, It is a 100-400 multiply by the crop factor first then multiply by the extender 1.4 or 2, to get the final number

bleirer

jeep_daddy wrote:

Yes...but the V2 is MUCH sharper than the V1

But you agree version 1 will autofocus the same as version 2? I thought you said version 1 wouldn't in your first post.

lamiaceae Loc: San Luis Obispo County, CA

will47 wrote:

I just read a review of the Canon 100-400mmL f4.5-5.6.

This article stated that with a 1.4 extender the camera was 224-896mm.

With a 2x extender it was 320-1280mm. (probably no auto focus)

How

Camera 7D Mark ll

When you drink the koolaid too.

Blurryeyed Loc: NC Mountains.

will47 wrote:

I just read a review of the Canon 100-400mmL f4.5-5.6.

This article stated that with a 1.4 extender the camera was 224-896mm.

With a 2x extender it was 320-1280mm. (probably no auto focus)

How

Camera 7D Mark ll

The are calculating the 1.6 crop factor.

George II Loc: Fayetteville, Georgia

will47 wrote:

I just read a review of the Canon 100-400mmL f4.5-5.6.

This article stated that with a 1.4 extender the camera was 224-896mm.

With a 2x extender it was 320-1280mm. (probably no auto focus)

How

What Paul says....if he tells me a piss any can pull a freight train I’ll hook him up,
“ The G”

Camera 7D Mark ll