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Messages - tron

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736
Canon General / Re: Desired fantasy gear
« on: May 20, 2013, 06:26:24 AM »
EF-S 400 4 IS

Why not try the EF 300mm f/4L IS, as it is the equivalent of 480mm on a 1.6x crop body?
Maybe because it would be the equivalent of much more mm (actually 640) on a 1.6x crop body and some need it?

No, a theoretical EF-S 400mm lens on a 1.6x crop body would be the equivalent of 400mm.  Note: EF-S lenses, which is what the OP requested, can only be mounted on a 1.6x crop body, so there is no crop factor.
Actually there is crop factor:
EF-S10-22 gives the equivalent of 16-35 for example.
The difference is that EF-S lenses cannot be used on full frame and there is no spare glass in the sense that the imaging circle is not big enough for full frame. So the quality may (or may not depending on the lens) suffer at the very edges.


737
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 20, 2013, 06:21:12 AM »
Finally I found time to test my 5D3 with a 300mm f/4 (non-iS) lens with EF2X II teleconverter.
The test was inside my house and not much light.

It worked fine  :)
More information about "not much light"

Shutter: 1/50 Aperture: f/8 ISO: 25600

According to an EV calculator I found it worked fine to 3.6EV.

Next step would probably be to use half the lights I used...

738
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 20, 2013, 05:21:30 AM »
Finally I found time to test my 5D3 with a 300mm f/4 (non-iS) lens with EF2X II teleconverter.
The test was inside my house and not much light.

It worked fine  :)


739
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 19, 2013, 12:00:14 PM »
I was surprised that Canon hadn't included f/8 AF on that body right from the start. Perhaps they needed to iron out some issues first, I don't know.
+1 Same with the 1DX. As it was replacing 1D4 (at least!) it was very strange that they omitted this feature initially.

740
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 18, 2013, 11:42:29 AM »
I don't like being an "early adopter" (although this firmware update is not exactly a totally new thing), but reading these comments has convinced me to go ahead and install it.
Firmware seems fine :)  Just read the instructions. The part at the end that says to remove the battery for a few seconds seems new to me. I remember members of this forum mentioning the same thing for the 7D upgrade but I do not remember this instruction for the 5DMkII firmware updates.

(Or there was and I simply omitted it and I didn't know it!! )

742
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 17, 2013, 01:21:57 PM »
Someone please explain this f/8 brouhaha to me: my 5D3 + Kenko 1.4x tele-extender + 400 & 70-300 auto-focus (at f/8, pre-firmware update) all day long. I just downloaded the firmware update and will install it later today, but I've been auto-focusing just fine at f/8 for some time. Am I missing something?

You are missing ... Canon teleconverters which report the correct maximum aperture to camera.

When you put kenco with your say 400 f/5.6 lens does it report it as having a maximum f/8 aperture? I guess not! It still reports it as f/5.6!

You have effectively a 1.4X400 = 560mm f/8 lens but the camera thinks it is connected to a f/5.6 maximum aperture lens and tries to autofocus!

When my Kenko is attached to my EF 400 f/5.6 lens, the 5D3 tells me that the max aperture available is f/8. It auto-focuses just fine (I used it that way between my last post and this post). The EXIF data in Lightroom lists the lens as the EF 400 f/5.6, but the images display the correct EXIF data: f/8. So, tron, maybe I'm still not seeing something, but this all jives.
That's interesting for Kenko! However, everyone who had Canon teleconverters could not have this option!

So as I said before it wasn't possible with Canon teleconverters...

743
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 17, 2013, 10:55:03 AM »
Someone please explain this f/8 brouhaha to me: my 5D3 + Kenko 1.4x tele-extender + 400 & 70-300 auto-focus (at f/8, pre-firmware update) all day long. I just downloaded the firmware update and will install it later today, but I've been auto-focusing just fine at f/8 for some time. Am I missing something?

You are missing ... Canon teleconverters which report the correct maximum aperture to camera.

When you put kenco with your say 400 f/5.6 lens does it report it as having a maximum f/8 aperture? I guess not! It still reports it as f/5.6!

You have effectively a 1.4X400 = 560mm f/8 lens but the camera thinks it is connected to a f/5.6 maximum aperture lens and tries to autofocus!

744
Lenses / Re: Poll: Most Wanted New Lenses of 2013.
« on: May 17, 2013, 09:07:07 AM »
I would LOVE to see the return of DO lenses, Got to use a 400 f/4 DO today and it was a joy, the contrast/color is a bit off but super easy to fix in post.
+100000 !!!!

I would be interested but this lens' IQ has been controversial.

Some say it is very good, some not (some determine 2003 as the make year that made the difference.

I remember correctly at the-digital-picture site the 400DO didn't take the teleconverters well (IQ wise).

745
EOS Bodies - For Stills / Re: F/8 Autofocusing impressions
« on: May 17, 2013, 09:01:28 AM »
If I could afford it, I would preorder the 200-400 but that is not an option(My Wife clarified that for me).
Does she have the same hard feelings for EF500 f/4L IS II ?  ;D

746
Lenses / Re: I have a weight limit....what would you bring?
« on: May 17, 2013, 05:17:10 AM »
Right now, I am planning to bring my 70-200 f/4 IS, my 24-104, and my 17-40.

Do you really need to fill that 40-70mm gap? 17-40L + 70-200/4L IS could be enough.
OP seems to have one camera so that would cause lens change more often. Still it remains an interesting combination...

747
Lenses / Re: Poll: Most Wanted New Lenses of 2013.
« on: May 17, 2013, 05:11:57 AM »
Can we have ALL please ? (wishful thinking) ;D

Seriously though, that would be extremely bad for our wallets. It's better having each one every year or two (more wishful thinking)  ;D

748
Lenses / Re: When is the New 100-400 Coming?
« on: May 17, 2013, 05:04:28 AM »
If they produce a 100-400 that's a "twist" and is as light and small as my 70-200 F/4 IS with 4 stop IS and IQ as good as what we've got now, and if the price is less than $2000, I would jump.  But, that is impossible form an engineering and design and financial perspective.
If I were to just guess (I obviously have NO inside information) I would say that it would look like the bigger (and  heavier) brother of 70-300L ... Now the price would be higher too...

749
Lenses / Re: Can the 70-200 2.8L II IS replace my 100L and 135L?
« on: May 16, 2013, 09:15:58 PM »
I find it extremely hard to sell Lenses I no longer use so much, almost like selling my Children.
I understand what you mean.

But, I sold lenses I didn't like or need (and the battery grip of my stolen 40D) and saved a lot of money getting new camera and ... L lenses.

Only 1 was an L lens. The others were old non-L from the end of 80s or the early 90s (and 2 of them were SIGMA lenses)

So it depends.

750
Lenses / Re: Can the 70-200 2.8L II IS replace my 100L and 135L?
« on: May 16, 2013, 09:06:24 PM »
They are different. I cannot comment on 100L since I do not have it but I have the other two.

135mm: discrete, light, excellent for shooting at f/2.0 - f/2.2
70-200m: Excellent but... heavy and conspicuous.

But, it all depends on the specific use. Also I take with me either but not both depending on what I want to do.

I admit I enjoy the 135 more. But this is subjective...

(Sorry I didn't help)

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