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Messages - bjd

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1
Technical Support / Re: Grand Canyon panoramas
« on: December 29, 2014, 08:28:32 AM »
I will be shooting some single row, and possibly multiple row panoramas in a couple of months during a 3 day visit to the South Rim of the Grand Canyon.  I am looking ahead as to what lenses I might use for this.  Has anyone used the 100mm f/2.8L macro or the 135mm f/2L for stitched panoramas, and if so how well did they work for that? Thanks.

The 135L is great for panoramics, as long as the subject isn't too close, which it is unlikely to be when using this lens; certainly not the Grand Canyon. I'm attaching two 'double stacked' panoramics both shot on the 135L. Of all my panoramics these have a quality and brightness to them that I imagine I can see, others probably can't unless it is pointed out. As usual we are splitting hairs, but the use of longer focal lengths allow more volume of light to make the picture. This is one of the main advantages of a larger format system, the focal lengths used are longer, and they pass more volume of light for a given aperture. ( Not to be confused with light density - aka exposure).  It is also one of the issues with cramming more pixels into a given format size. Pixels are only one part of the resolution; you must have light as well. Once you have enough pixels to define a subject accurately ( along with all the others factors needed to do this), then adding more pixels is very much a law of diminishing returns, so I have no desire to own a 50 mp FF sensor sized camera. Panoramic stitches on the other hand are larger format. The original picture of Beverley Minster for example was about 175 mp with a format size of about 147mm x 73, so not far off a large 5x4 format film camera.

Same thing goes for the 100L. Very low distortion = good, far out nodal point = bad. If you are shooting subjects closer to you, then the less distortion and the shorter the nodal point of the lens the better. You can easily see this for yourself if you have a short prime and a standard zoom. With say a 40 pancake, which has both very low distortion and a short nodal point, stand in the corner of a room and then, keeping the camera level, sweep around the room looking through the viewfinder, watching the wall joint to the ceiling. Now put on a standard zoom and set it to 40mm. Most standard zooms at 40 have very low distortion. Do the same thing and watch how the edges of the frame twist and bend as you sweep round. This is parallax, and your stitching software will have to try and deal with this.

As I said at the beginning, not an issue with the 135L as the subject will be well away from you.
Fabulous shots.

2
Technical Support / Re: Grand Canyon panoramas
« on: December 29, 2014, 07:21:51 AM »
Hi, it may not be the GC, but here is one I did using my trusty EF 70-200mm f/2.8 IS II USM. In all 11 shots in Portrait mode. As the Lens was set at 70mm, I guess it would have worked at 100mm too. Stitched with Panaorama Studio, which works very well, and is (was) pretty inexpensive.
I have a pretty large version on the wall at work and the detail is very good.
Final size was 20863x4770 pixels, around 800MB.
Cheers Brian

3
Lenses / Re: The Long and Short of it. 2 Photos from the same Place
« on: December 09, 2014, 11:49:33 AM »
Astrophotography- walking towards the subject makes little difference to the perspective...
Doesn't that really depend on how far you walk? ;D

4
Photography Technique / Re: Photographs in the "Blue Hour"
« on: October 24, 2014, 11:35:07 AM »
Here's one from our local Canal Harbour. I think this was the Blue hour and not the Golden hour :-\
Cheers Brian

5
Landscape / Re: Post Your Best Landscapes
« on: October 14, 2014, 03:44:38 AM »
The Cuillins, Skye.

West Scottish Highlands and Skye by madmackem, on Flickr
That must be pretty low resolution, I can't see the swarm of midges, OTOH they do call then "no-sees".
Its fabulous light you captured there. Great shot.
Cheers Brian

7
Animal Kingdom / Re: Show your Bird Portraits
« on: October 14, 2014, 01:55:40 AM »

LOL!  You captured their special moment.
Watching some California Quail make their way across a group of boulders when this happened.  Do they even need wings?

Aw come on.... we've seen numerous examples of Birds levitating on this Forum  ???
Great capture.
Cheers Brian

8
Animal Kingdom / Re: Show your Bird Portraits
« on: October 14, 2014, 01:48:58 AM »
I think I found the clever one out of the bunch.

Jim
Its really a boudoir shot, and she's holding her breath...  ;D
Cheers Brian

9
Landscape / Re: Post Your Best Landscapes
« on: October 13, 2014, 12:17:23 PM »
Here's a few from the Lake District in September.
Cheers Brian

10
Landscape / Re: Post Your Best Landscapes
« on: October 13, 2014, 12:12:59 PM »
sun rises over Leigh on Sea, Essex (6D + 70/300L

Sunrise - Leigh on Sea by petach123 (Peter Tachauer), on Flickr
Essex? Do you really mean that?  :P


Just joking, I saw a long BBC Documentary about all the beautiful countryside in Essex, and I was
totally suprised.
Its a great capture. Well done.
Cheers Brian

11
Landscape / Re: Beautiful sunsets
« on: October 13, 2014, 12:09:07 PM »
Not quite sunset yet!

Cheers Brian
Lovely light. Nicely done Brian.
Thanks, here's another three from this weekend.
Cheers Brian

12
Landscape / Re: Fall colours
« on: October 12, 2014, 04:09:55 AM »
A few Autumn leave shots from a trip to Brandelhow Park on the West shoreline of Derwent Water, English Lake District.
Shot on my original 5D, all 24-105L. All hand held at 800 ISO, which the 5D mki seemed to be really good at.
Dang.......
I was there the first two weeks in September, early enough to still have good weather (which we did have),
but too early for any decent colour.

Lovely shots.
Cheers Brian
Thanks Brian and dpc. It is beautiful up there.
The morning of our last day, there is a bit of colour coming but not much.
Cheers Brian

13
Landscape / Re: Fall colours
« on: October 12, 2014, 03:58:43 AM »
17mm f4L TS-E and 5DIII
Eldar, thats a fabulous shot. Do you mind explaining how exactly you used the Tilt or Shift in this shot?

I'd be interested in such a Lens for architecture, and know they can also be used for other fields too,
but I'm wondering how you used it here?

Cheers Brian
Thanks Brian, Apparently that image resonated with quite a few. Post processing was done on a small laptop, so I have a better version at home (currently I´m traveling and on the same laptop). The blue/green and highlight/shadow settings in the upper part is not very good.

But to your question; It is a fairly straight forward shot. I start with a center focus and determine exposure when the lens is in neutral position. Then I use live view and zoom in on the lower side of the image, which is totally out of focus to begin with. Then I tilt the lens until that part of the image is in focus. I shot the image at several different f-stops, but prefer this one at f10.

Some more patient and structured than me would probably have shot multiple exposures and merged them, but this is a single exposure

Both this lens and the 24 TS-E are key arguments to stay with Canon. Phenomenal lenses.
OK, thanks very much. Hmmm, christmas is coming..........
Cheers Brian

14
Landscape / Re: Fall colours
« on: October 11, 2014, 05:52:00 AM »
A few Autumn leave shots from a trip to Brandelhow Park on the West shoreline of Derwent Water, English Lake District.
Shot on my original 5D, all 24-105L. All hand held at 800 ISO, which the 5D mki seemed to be really good at.
Dang.......
I was there the first two weeks in September, early enough to still have good weather (which we did have),
but too early for any decent colour.

Lovely shots.
Cheers Brian

15
Landscape / Re: Fall colours
« on: October 11, 2014, 05:48:37 AM »
17mm f4L TS-E and 5DIII
Eldar, thats a fabulous shot. Do you mind explaining how exactly you used the Tilt or Shift in this shot?

I'd be interested in such a Lens for architecture, and know they can also be used for other fields too,
but I'm wondering how you used it here?

Cheers Brian

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