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Messages - rpt

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856
Animal Kingdom / Re: Your best animal shots!
« on: May 27, 2013, 10:11:11 AM »
Damp dark day here today, the Squirrel was in focus till he jumped. AF just didn't follow him though.
Still thought I'd post it anyway. I hope it isn't my best animal shot!
Cheers Brian

Historic shot! You have posted the second photo (the first one was taken by fohtohz) which illustrates the Nobel prize worthy theory of localized gravity malfunction recently put forth by rpt (in the "show your bird portraits" post thread). ;D
There you go! The experiment is repeatable!

I'm on my way, I'm on my way to visit the wizard of Nobel!
 :P

857
1D X Sample Images / Re: Any Thing shot with a 1Dx
« on: May 27, 2013, 10:06:50 AM »
For you Edward.
It's cheetah day!




Wow sanj ! Have you been practising ?!

Now that picture doesn't need a sky  ;).  Really good.  :)

hahahahahahahahahahahahahahahahahah..................
Lovely pic. Another B&W candidate :)
Or sepia even...

858
Lenses / Re: Focus and recompose related question
« on: May 27, 2013, 10:03:53 AM »
Ting! well looks like the penny finally dropped :D

So I read a few more articles and all of them refer to a plane of focus. So here is my new (and hopefully correct) understanding. The lens is shaped such that the focus of an image on the sensor or film is done for a plane parallel to the plane of the receptor. Thus the focusing distance indicated by the lens is the perpendicular distances between the two planes. See, that was my problem - I always thought that things would be in focus on an arc whose radius was the focusing distance. So in that case F&R would have worked - and it did for me from '67 till 2000 as most of my outputs were either contact print of 120 film or 5 by 3 or 6 by 4 prints.

Neuro, thanks for persisting :)

Others, thanks for the inputs.

So I had better learn how to do back button focus and selecting the appropriate AF point...

859
Lenses / Re: Focus and recompose related question
« on: May 26, 2013, 12:49:52 PM »
Surely there has to be some computation of angles internally to identify the focusing plane in order to eliminate the back-focus.

Why does there have to be?  The point is, with a fast lens shot wide open, don't focus/recompose. Use an outer focus point so you don't have to move the camera.  With narrow apertures and/or distant subjects, the deeper DoF masks the backfocus, so focus/recompose is ok.
:)

Sorry, I don't doubt that it needs to be done. The programmer in me is curious about how it is implemented thats all.

860
Lenses / Re: Focus and recompose related question
« on: May 26, 2013, 10:56:40 AM »
Sorry, incorrect inference. There's no 'computation of angles' on a Canon camera. Using an outer AF point eliminates backfocus if it enables you to focus on your subject without recomposing, reduces backfocus if it means you don't move the camera as much to get the composition you want.

I state 'Canon camera' because some Hasselblad bodies use a gyro sensor to detect camera rotation during recomposition, and adjust focus to compensate.
See, the Hasselblad thing makes sense to me. Surely there has to be some computation of angles internally to identify the focusing plane in order to eliminate the back-focus.

Thanks for the inputs.

861
Lenses / Re: Focus and recompose related question
« on: May 26, 2013, 09:36:13 AM »
http://www.visual-vacations.com/Photography/focus-recompose_sucks.htm
Thanks. So what I infer from this article is that selecting an AF point other than the center point the camera computes the angle to the subject and derives the focus plane from that. Is that a correct inference? See none of the articles talk of this...

862
Lenses / Focus and recompose related question
« on: May 26, 2013, 06:51:18 AM »
I have been doing focus and recompose since I started to photograph! I mean with my old Lubitel what choice did I have? Same with AE1 and the 300D. Now I always thought that the focus is done along the radius. Is my understanding incorrect? Is it done on a plane perpendicular to the ray of light going through the center of curvature of the lens? I have seen a couple of articles on this but there is no real explanation there. They just say that the focus goes off a bit. Very early on, I would shoot at f8 or f11 or even f16 so I guess I never had an issue with DOF...

If you could point me to some articles that would help.

Thanks in advance.

Rustom

863
Animal Kingdom / Re: Show your Bird Portraits
« on: May 26, 2013, 06:25:39 AM »

Good lord! Gravity seems to be malfunctioning at that spot. ;)

Lovely picture :)

LOL ;D

Maybe there is a little bird trampoline hidden just behind the rail. Really cool shot!

>:( I make this Nobel prize worthy discovery and you dismiss it of as a trick?

:P

Sorry rpt...I didn't realize the gravity of the situation 8)
LOL! You made my day!

864
Lenses / Re: 24-105L Curved horizon.
« on: May 25, 2013, 11:43:34 PM »
After a little (ok, a lot  :o) of head scratching and figuring out I changed it to this. Which is much better than it was. I used the PTlens plugin for Aperture. FYI.

I feel like this should be easier to do? Lol So maybe I need a better workflow. But I have to admit I hate this part of this photography thing. I sort of want the images to just look great on the computer right from the SD card...
In LR it is one check box that needs to be checked...

865
One of the conversations on the ML forum they mentioned that the 128GB UDMA 7 cards were slower than the 64 GB UDMA 7 cards and they ended up dropping frames. I think they were talking about Lexar. So they were shooting on the 64GB cards...

866
Animal Kingdom / Re: Show your Bird Portraits
« on: May 25, 2013, 11:26:33 PM »

Good lord! Gravity seems to be malfunctioning at that spot. ;)

Lovely picture :)

LOL ;D

Maybe there is a little bird trampoline hidden just behind the rail. Really cool shot!

>:( I make this Nobel prize worthy discovery and you dismiss it of as a trick?

:P

867
Animal Kingdom / Re: Show your Bird Portraits
« on: May 25, 2013, 11:22:35 PM »
Seven of our thrushes (six of them are being sat on by the mother here).

Cheers Brian
Lovely! Is she nesting inside your house? There seems to be three light sources showing up in her eye and one looks like a fluorescent tube light.
In our shed. I had the light on to see if it would help my webcam, it looks down into the nest.
If I go in the shed then she just sits there very still, so I avoid eye contact. Obviously I try to
keep out of the shed, and now all are hatched a lot of time she's not sat on the nest. So we get
along OK.
Cheers Brian
Fabulous! Sometimes they just know they are safe. I am trying to communicate with the hawk that frequents our garden. Let us see how it goes - so far he lets me talk and hangs around for a while :)
I think in the end you are just part of the environment, they know that you pose no great danger if they are around regularly. The birds (Mainly magpies) run around behind our dog stealing his breakfast on a morning.
But its a long way from tame.
Cheers Brian
:) That must be a fun sight! My friend's German Shepherd had a particularly rough time with a pair of sparrows. One would distract her and the other would go on a dive and pull off some of her fur! After six or so sorties the dog had enough and ran off under a bed :)

868
Animal Kingdom / Re: MY dog
« on: May 25, 2013, 10:26:45 PM »
@ rpt: no, he is just bringing one of his pets.
Homer is a cross breed too from a Cavalier King Charles and a husky.
Yours looks like a cutie.

Most dogs are fun. I love them.
Yes they are! we have two dogs and a cat. It is great! They are great friends.

869
Canon General / Re: Canon direct mail marketing
« on: May 25, 2013, 12:20:23 PM »
Isn't it obvious? They know that you do not have the T5i or the SL1 - duh!

870
Animal Kingdom / Re: Birdwatching @ Lake Neusiedel National Park
« on: May 25, 2013, 12:11:27 PM »
Some nice pics there. What camera body were you using?  The pic's of the birds in the reeds can be frustrating / challenging due to the clutter and the auto focus. I've taken so many pics of in-focus twigs with out of focus birds on them ;)
It is in the EXIF. 7D with 70-200L II and 2x.

Lovely pictures.

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