May 28, 2015, 06:16:48 AM

Author Topic: New Canon 100-400mm Mk2 lens with 2x extender mk3  (Read 4332 times)

takesome1

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #15 on: January 07, 2015, 09:07:57 AM »
Just an observation: I'd have thought that in practice 2x extenders are best kept for fast lenses.

I have always found that in practice 2x extenders are best left at home on the shelf.

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #15 on: January 07, 2015, 09:07:57 AM »

J.R.

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #16 on: January 07, 2015, 09:57:40 AM »
Just an observation: I'd have thought that in practice 2x extenders are best kept for fast lenses.

There is some truth in that. However, for someone chasing birds, any addition to the focal length is welcome. This usually results in experimentation with extenders.

Nevertheless, getting a supertelephoto is well outside of a normal budget, the 2x extenders provide a lot of additional focal length albeit at a price in IQ.

adhocphotographer

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #17 on: January 07, 2015, 10:10:32 AM »
Just an observation: I'd have thought that in practice 2x extenders are best kept for fast lenses.

There is some truth in that. However, for someone chasing birds, any addition to the focal length is welcome. This usually results in experimentation with extenders.

Nevertheless, getting a supertelephoto is well outside of a normal budget, the 2x extenders provide a lot of additional focal length albeit at a price in IQ.

+1, i tend to always have a TC with me, just in case! :)
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AlanF

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #18 on: January 07, 2015, 10:15:32 AM »
Just an observation: I'd have thought that in practice 2x extenders are best kept for fast lenses.

There is some truth in that. However, for someone chasing birds, any addition to the focal length is welcome. This usually results in experimentation with extenders.

Nevertheless, getting a supertelephoto is well outside of a normal budget, the 2x extenders provide a lot of additional focal length albeit at a price in IQ.

+1, i tend to always have a TC with me, just in case! :)

Chasing birds at f/11 without AF is not easy, to say the least, unless the bird is sitting immobile. In my opinion, the sheer inconvenience in using a 2xTC on an f/5.6 and the concomitant loss of IQ are not worth the the extra reach over 1.4x, which will be fairly marginal anyway because of the poorer IQ and the higher noise.
« Last Edit: January 07, 2015, 10:47:22 AM by AlanF »
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rpt

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #19 on: January 07, 2015, 10:53:51 AM »
Hi,
Thanks for all the replies. I suppose I'm trying to find out if others are experiencing the same or whether I am doing something wrong without realising it. I've attached 2 pictures of the recent full moon at 400mm without TC and 800mm, the difference is stark. Given the moon is at infinity I would have thought finding focus would be easier than at a shorter distance. Each photo has had a bit of post processing in Lightroom. At the moment I am concluding the 2x extender either degrades image quality to an unacceptable level and / or gaining focus is a hit or miss affair.
What were the camera settings?

burnfield

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #20 on: January 07, 2015, 11:00:58 AM »
Hi,
Thanks for the further comments. I'll try weights cos it is a metal tripod (Benro) with an Induro BHD 1 ball head.

I am getting strange results - attached two pics of a stone wall and both are pretty sharp, one using the extender and the other the basic lens. Cropped the 400mm pic to give the same field of view as the 800. Both shot at 1/25sec!!! and no camera shake and my previous moon pics were 1/800sec for the 800mm and 1/250sec for 400mm yet the fast shutter speed for the moon gives a blurred image. So not sure the source of my problem is vibration. Really confused why I can't get a decent focus at infinity (ie the moon) when these two pics indicate the combo is not bad.

mackguyver

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #21 on: January 07, 2015, 11:36:37 AM »
Hi,
Thanks for the further comments. I'll try weights cos it is a metal tripod (Benro) with an Induro BHD 1 ball head.

I am getting strange results - attached two pics of a stone wall and both are pretty sharp, one using the extender and the other the basic lens. Cropped the 400mm pic to give the same field of view as the 800. Both shot at 1/25sec!!! and no camera shake and my previous moon pics were 1/800sec for the 800mm and 1/250sec for 400mm yet the fast shutter speed for the moon gives a blurred image. So not sure the source of my problem is vibration. Really confused why I can't get a decent focus at infinity (ie the moon) when these two pics indicate the combo is not bad.
I don't think it's motion blur - just softness from the lens+extender combo.  It matches Brian's results from The Digital Picture.  The 2x isn't ideal for most lenses and it looks like the new 100-400 is (sadly) no exception.
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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #21 on: January 07, 2015, 11:36:37 AM »

KimH

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #22 on: January 07, 2015, 12:30:57 PM »
Hi,
Thanks for the further comments. I'll try weights cos it is a metal tripod (Benro) with an Induro BHD 1 ball head.

I am getting strange results - attached two pics of a stone wall and both are pretty sharp, one using the extender and the other the basic lens. Cropped the 400mm pic to give the same field of view as the 800. Both shot at 1/25sec!!! and no camera shake and my previous moon pics were 1/800sec for the 800mm and 1/250sec for 400mm yet the fast shutter speed for the moon gives a blurred image. So not sure the source of my problem is vibration. Really confused why I can't get a decent focus at infinity (ie the moon) when these two pics indicate the combo is not bad.
I don't think it's motion blur - just softness from the lens+extender combo.  It matches Brian's results from The Digital Picture.  The 2x isn't ideal for most lenses and it looks like the new 100-400 is (sadly) no exception.

I am not sure what the root cause is here.... It's complicated as some would say, it depends!

I have the RRS 3 tripod with the fitting RRS gimbal and when trying the 300-2.8 with 1.4 - well balanced - across the valley where I live, it was VERY sensitive to wind and the platform I was on (a balcony) - then the 100-400 II with and without 1.4... Same experience.

My experience is that when using 10x you get an idea of how the pict will look - watching wind - and leaving time for the IS to engage makes the world of difference. Assuming cable or camRanger or remote is in use.

It honestly felt a bit like a sharpshooter must feel when doing their training.
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hockeydude35

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #23 on: January 07, 2015, 09:42:33 PM »
I just received my 100-400II along with the 2xIII today.  Here's an 800mm moon shot that I took this evening, for additional comparison.  This is probably about 70% crop or so, and I did play with it a bit in Lightroom just to see what it was capable of.  This was from an aluminum tripod, 10 second countdown, 1/13s exposure, f/14.  I manually focused it with 10x live view, keeping IS on until I was ready to take the shot.  I think it came out pretty well and so far I'm pretty impressed with the few shots I'm seeing using the 2x.  I'm hoping to get out this weekend and really try it out with some wildlife. 

J.R.

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #24 on: January 07, 2015, 10:09:08 PM »
Just an observation: I'd have thought that in practice 2x extenders are best kept for fast lenses.

There is some truth in that. However, for someone chasing birds, any addition to the focal length is welcome. This usually results in experimentation with extenders.

Nevertheless, getting a supertelephoto is well outside of a normal budget, the 2x extenders provide a lot of additional focal length albeit at a price in IQ.

+1, i tend to always have a TC with me, just in case! :)

Chasing birds at f/11 without AF is not easy, to say the least, unless the bird is sitting immobile. In my opinion, the sheer inconvenience in using a 2xTC on an f/5.6 and the concomitant loss of IQ are not worth the the extra reach over 1.4x, which will be fairly marginal anyway because of the poorer IQ and the higher noise.

True. As I said, using 2x TC with f/5.6 lenses is usually in the nature of experimentation usually. The additional FL is at great cost - no AF, f/11 and less than excellent IQ.

J.R.

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #25 on: January 07, 2015, 10:11:47 PM »
What was the EXIF for the moon shots

Hi,
Thanks for the further comments. I'll try weights cos it is a metal tripod (Benro) with an Induro BHD 1 ball head.

I am getting strange results - attached two pics of a stone wall and both are pretty sharp, one using the extender and the other the basic lens. Cropped the 400mm pic to give the same field of view as the 800. Both shot at 1/25sec!!! and no camera shake and my previous moon pics were 1/800sec for the 800mm and 1/250sec for 400mm yet the fast shutter speed for the moon gives a blurred image. So not sure the source of my problem is vibration. Really confused why I can't get a decent focus at infinity (ie the moon) when these two pics indicate the combo is not bad.

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Re: New Canon 100-400mm Mk2 lens with 2x extender mk3
« Reply #25 on: January 07, 2015, 10:11:47 PM »