Saving image jpeg gets it's height stretched?

mrmac · 08-08-2009 02:06PM #1

I went out last night to take a few shots of the moon, hoping for something to enter in the current assignment. The moon was full, and very bright!
When I have these in PS, they look fine, no problem. I resize them to 800pix, again, they look fine. But once I save the jpeg, and open it again, the image is stretched!

I've tried squashing the image, prior to resizing and saving, but it still looks stretched afterwards.

What am I missing here? Is saving to jpeg somehow altering the image size?
Any advice on this would be great. Here's some sample images.

[IMG][/img]

Morrisseeee · 08-08-2009 02:44PM

I was looking at the exif data for your last one, ISO 200, 200mm, f3.5 but........speed 1/100sec ! I thought it would have been higher, like 1/500 of a sec or faster !
As for stretching, it might be just loosing quality rather than stretching !

soccerc · 08-08-2009 02:56PM

Have you unticked constrain proportions?

Ghost Train · 08-08-2009 03:00PM

look fine in photos posted, love the detail in the moon shot. How much distortion are you seeing and is it just in photoshop that the jpegs look wrong?

mrmac · 08-08-2009 04:50PM

Morrisseeee wrote: »

.... speed 1/100sec!.... !

That big 'ol moon was sure bright!
Oh, I should mention, it was at 200mm, with a Kenko x2 TC = 400mm.

soccerc wrote: »

Have you unticked constrain proportions?

No, no. 1 & 3 where locked. I did unlock no.2, and squashed the height a bit, but seemed to make no difference after I saved it.

Ghost Train wrote: »

look fine in photos posted, love the detail in the moon shot. How much distortion are you seeing and is it just in photoshop that the jpegs look wrong?

The images look "oblong" to me, but only after I've re-opened the file again?
Tried viewing the saved file in M$ explorer & PS, but they look the same = stretched! Everything else is fine.

Ghost Train · 08-08-2009 05:23PM

mrmac wrote: »

The images look "oblong" to me, but only after I've re-opened the file again?
Tried viewing the saved file in M$ explorer & PS, but they look the same = stretched! Everything else is fine.

are the files you uploaded looking stretched in your browser on this page?

and are all the other images on the web looking normal? that would be weird and point to something with the particular jpegs or photoshop save process

Can only think that its a monitor aspect ratio or something, maybe you could try change monitor resolution just to see if it has any effect

mrmac · 08-08-2009 06:14PM

Ghost Train wrote: »

.... Can only think that its a monitor aspect ratio or something, maybe you could try change monitor resolution just to see if it has any effect

Do they look "round" to you?
It looks oblong to me, on both my PC monitor, and my laptop.

Maybe I just need coffee, and to clean my glasses!!!

Thoie · 08-08-2009 06:30PM

mrmac wrote: »

Do they look "round" to you?
It looks oblong to me, on both my PC monitor, and my laptop.

Maybe I just need coffee, and to clean my glasses!!!

Well, the ones showing on this page look round to me. Now I'm wondering if I need coffee and glasses

Ghost Train · 08-08-2009 06:33PM

Yep look as round as they should be to me, I think the moon isn't perfectly round anyway so that could be it :P

mrmac · 09-08-2009 12:22PM

Morrisseeee wrote: »

I was looking at the exif data for your last one, ISO 200, 200mm, f3.5 but........speed 1/100sec ! I thought it would have been higher, like 1/500 of a sec or faster !
As for stretching, it might be just loosing quality rather than stretching !

Should point out that I was using a 70-200 zoomer, with a kenko x2 TC. I'd been taking some 60sec. exposures, with my new 50mm 1.8, prior to this. So I just gave a rough guess at the settings, and it looked ok.

Saving image jpeg gets it's height stretched?

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