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Messages - tron

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856
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.

857
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)

858
The Samyang's 14mm distortion is only a problem for architectural photography. You will have no problem for the type of photography you want.
Keep in mind the 500 rule:

500 / <lens focal length> is about the maximum you can shoot in seconds to avoid star trails.

So for Samyang 14mm it is 500/14 = a little more than 30sec (35sec actually so 30sec is a rather safe selection).

Even so you will see some star trails at 100% or more...

The more the megapixels the more star trails you get for the same exposure!

Since 40D is an APS-C camera it has the pixel density of a 10*1.6*1.6 = 25.6 Mpixels.
You may need to decrease the exposure to less than 30sec.

859
EOS Bodies - For Stills / F/8 Autofocusing impressions
« on: May 16, 2013, 12:56:51 PM »
Now that 5DMkIII has been upgraded to support f/8 autofocusing have you tried using it? Of course this question applies equally to 1D series owners too.

1: Do you find AF practical/fast/accurate ?
2: How is the quality retained? 

Well, I know that the latter is NOT f/8 autofocusing related but now that this feature is available it may invite more and more people to try using it (instead of just watching the excellent the-digital-picture site). Apart from the new generation super telephotos that can probably handle the version III teleconverters well, how smaller/cheaper Canon lens/teleconverter combinations work? (for example EF300MM f/4 with 2X, EF100-400mm with 1.4X, EF400mm f/5.6 with 1.4X)

I am thinking mostly Canon lenses with Canon II or III series teleconverters but feel free to comment on any camera/lens/teleconverter combination you want regarding autofocusing and quality issues.

860
Canon General / Re: Desired fantasy gear
« on: May 16, 2013, 12:28:53 PM »
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?

861
Lenses / Re: When is the New 100-400 Coming?
« on: May 16, 2013, 12:05:55 PM »

862
Lenses / Re: When is the New 100-400 Coming?
« on: May 16, 2013, 10:15:22 AM »
if you have sources to tell you that there are prototypes.

why donĀ“t they tell you at least if it is a push-pull design or not?

or is a push-pull design tested and a "normal" design?
+1

863
Lenses / Re: Who has pre-ordered or will order 200-400
« on: May 15, 2013, 01:55:46 PM »
See now I have a dilemma...I have been saving my money to purchase the 400mm 2.8 for the past couple of years and I'm about $1500 off from paying straight cash for it. I am planning to have it by the time fall rolls around for some high school football action. Now with this lens finally becoming a reality I wonder should I just go ahead go for this or just go ahead and pull the trigger on the 400 since I've been saving for it for so long...

Decisions, decisions...
Unless you will need less than 400mm I cannot see why you must change plans.

400 2.8 L IS II weighs the same as the 200-400 and is one stop better...


864
Canon General / Re: Desired fantasy gear
« on: May 15, 2013, 10:53:14 AM »
Am wondering what gear we all want that is not being manufactured yet but we wish it were.

I start:
A focusing screen (for cameras that accept interchangeable screens eg 1dx and 5d2) with proper split screen focusing aid. This will help me use Zeiss lenses better and focus manually Canon lenses in low light etc.
And, if I could: 24-105 f2.8 IS with good corner sharpness. This will be my ultimate travel lens.

Thank you.
This may not quite impossible judging from Tamron's AF 28-105MM F/2.8 LD Aspherical (IF)

865
Lenses / Re: Who has pre-ordered or will order 200-400
« on: May 14, 2013, 09:45:38 PM »
Too expensive, too heavy, too short. But then I am not a pro so its just an amateur's opinion.

Still, the 500mm f/4 IS II is very tempting even for an amateur...  :)  :)  :)

866
Lenses / Re: EF 24-70mm F2.8 L ver 2 or 3 Prime Lens
« on: May 14, 2013, 09:42:02 PM »
If you shooting with FF, it is almost a no brainer to take 24-70 II over 3 non-L primes
+1

867
Canon EF Prime Lenses / Re: Canon EF 85mm f/1.2L II USM
« on: May 14, 2013, 09:39:36 PM »
My mini-review of this lens.

http://ramonlperez.tumblr.com/post/33253428138/fast-prime-shoot-out-pt-1-85mm-1-2l-ii-mini-review

+1 Nice practical review.  It was a very good idea to compare the lenses with similar framing. That way the DOF difference is obvious.

868
Just a simple question: How many Canon lenses have suffered fluorite element fracture in the field?

I guess there are professional on this forum to enlighten us...

869
Since I have a CANON system I would get SL1 (the same reason other posters said).

I would just like to compare it (size-wise) with 18-55 and with 18-135 and 15-85.

870
http://www.superwasp.org/index.html

http://www.superwasp.org/technical.htm

The 2 links refer to SuperWASP (W.A.S.P. = Wide Angle Search for Planets) an  extra-solar planet detection program.

They use an array of EF200mm 1.8L   Canon lenses.

So even if Canon lenses are not taken to space they are used in space projects!

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