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FORUMS Canon Cameras, Lenses & Accessories Canon EF and EF-S Lenses 
Thread started 29 Jan 2014 (Wednesday) 01:02
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School me on the internal filter slot in the 17-40

 
FarmerTed1971
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Jan 29, 2014 01:02 |  #1

As the title says. Just picked up this lens tonight and studying it I saw the slot.

Is this for sliding in gels or is there filters commercially available for this slot?


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JeremyKPhoto
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Jan 29, 2014 01:29 |  #2

According to B&H

Like many "L" lenses, it uses 77mm filters, but also has a rear gelatin filter slot behind the lens mount that can hold three gel filters.

http://www.bhphotovide​o.com …_EF_17_40mm_f_4​L_USM.html (external link)


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FarmerTed1971
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Jan 29, 2014 01:38 |  #3

Love to see some samples from someone that actually uses the slot.


Getting better at this - Fuji Xt-2 - Fuji X-Pro2 - Laowa 9mm - 18-55 - 23/35/50/90 f2 WR - 50-140 - flickr (external link) - www.scottaticephoto.co​m (external link)

  
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graham121
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Jan 29, 2014 02:15 as a reply to  @ FarmerTed1971's post |  #4

Well I have just learnt something...I didn't even know this lens had a gelatin filter slot...and even then I had to google it to find a picture of its...though now I know what it looks like I can see it clearly.

Now to find some filters....


A coupla bodies and a few lenses

  
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titi_67207
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Jan 29, 2014 03:54 |  #5

graham121 wrote in post #16646197 (external link)
Now to find some filters....

:cool: This ;)


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ceriltheblade
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Jan 29, 2014 06:08 |  #6

gel filters are just colored filters, right?


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jimewall
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Jan 29, 2014 09:51 |  #7

ceriltheblade wrote in post #16646404 (external link)
gel filters are just colored filters, right?

Mostly, but there are neutral density.


OP you would want optical quality, not the gels made for lighting. Never used them, I just know there is a difference.

Remember the 17-40l was around for film cameras, where you need color correcting. Color correcting would not be needed the same way with digital cameras. (Possibly in a studio with different light sources. Even IF that we're the case, you would want to control light source/s directly not all of the them. The gel on the camera lens changes all of the light sources reaching the sensor.)

On the lens for digital polarizer or ND is really all that is needed for digital. (Possibly a protective filter if you like them.) The filter thread would be easier for the ND than the gels. You need to rotate a polarizer, so the kind of slot for gel filters doesn't work.

If I remember the 17-40 came with a metal template for cutting gels to the right size- I don't think I even have the that piece. If I do, I don't know where it is.


Thanks for Reading & Good Luck - Jim
GEAR

  
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FarmerTed1971
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Jan 29, 2014 09:55 |  #8

Thanks for that.


Getting better at this - Fuji Xt-2 - Fuji X-Pro2 - Laowa 9mm - 18-55 - 23/35/50/90 f2 WR - 50-140 - flickr (external link) - www.scottaticephoto.co​m (external link)

  
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School me on the internal filter slot in the 17-40
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