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ZEISS DTI thermal imaging cameras. For more discoveries at night, and during the day.

100% crop with stacked converters (1 Viewer)

Roy C

Roy C

Occasional bird snapper
Here is a shot and crop that I took today. I had stacked 1.4x and 2x tc + 300/2.8 (840mm) trying to get some record shots of a distant Great White Egret when I saw a flash of Emerald and took this snap.
It never fails to amaze me just how much detail is captured and I have posted this as a tribute to the resolving powers of Canon white lenses (and the 7D).
The crop is just 2.3% of the total image by my reckoning. BTW I have obviously edited the crop.
 

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:t:Also credit has to go to the operator and method used to support and steady the 1,344mm lens when you calculate the crop factor into the focal length.
Massive!:t:
 
Hi Roy..............I thought I'd respond quickly to your post not because I have anything useful to add but just to show the coincidence of an image I took yesterday.
I am the very pleased owner of a s/h canon 500mm f/4 recieved a couple of weeks ago. Thus am learning how to use (and carry !) it and yesterday i was trying it with a 1.4 and a 2X converter. However I stupidly left my remote shutter release at home and most of my shots were fuzzy and those that weren't were focused on some other area of the image where the birds weren't.
The attached image, shot at 1000mm, is unclear but I've just noticed some of the water is reasonably sharp so it's probably inexperience with manual focusing more than vibration or maybe a combination.
Anyway a Great Egret AND a Kingfisher.:t:
Best
Robin
 

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Robin Harrison said:
Hi Roy..............I thought I'd respond quickly to your post not because I have anything useful to add but just to show the coincidence of an image I took yesterday.
I am the very pleased owner of a s/h canon 500mm f/4 recieved a couple of weeks ago. Thus am learning how to use (and carry !) it and yesterday i was trying it with a 1.4 and a 2X converter. However I stupidly left my remote shutter release at home and most of my shots were fuzzy and those that weren't were focused on some other area of the image where the birds weren't.
The attached image, shot at 1000mm, is unclear but I've just noticed some of the water is reasonably sharp so it's probably inexperience with manual focusing more than vibration or maybe a combination.
Anyway a Great Egret AND a Kingfisher.:t:
Best
Robin
Click to expand...
Like you say Robin, parts of the image is in focus. I had a slight advantage in that my combo still AF's even on a non 1 series as the Camera only see the 2x tc and thinks it is still f5.6.
 
Roy....nicely done. What do you think was the distance? ... What is that bird perched on by the way?

.... at levels beyond 30 meters or so, I wonder how a digiscoping 'set-up' foto would compare to a camera 'set up / crop'? A digiscoping set up would not need to be cropped too much at a distance but inherently has more noise.

Has anyone compared or is there a comparison between digiscoping fotos and that of L lens quality with multiple TC's? jim
 
lmans66 said:
Roy....nicely done. What do you think was the distance? ... What is that bird perched on by the way?

.... at levels beyond 30 meters or so, I wonder how a digiscoping 'set-up' foto would compare to a camera 'set up / crop'? A digiscoping set up would not need to be cropped too much at a distance but inherently has more noise.

Has anyone compared or is there a comparison between digiscoping fotos and that of L lens quality with multiple TC's? jim
Click to expand...
Hi Jim, the bird was perched on the wall of a quayside. I would estimate the distance to be 40 or 50 metres.
 
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