Lightroom : How to crop to exact pixel dimensions?

I want to create a 100% crop from a photo for display as an attachment on POTN. The limits are 800 pixels on the longest side and 100kB for an uploaded photo.

While it is easy enough to crop I can't find any way to see what dimensions I am cropping to while I perform the crop. I have to apply a guesstimated crop and go back to the library where I can see the crop dimensions in the metadata. But if I'm a bit off I need to go back to the develop module and make another guess. I can't find any realtime feedback on what my crop is. I've tried the Lightroom help and Googled around but am coming up blank.

In DPP cropping to an exact pixel size is easy because you get realtime feedback as you move the crop marks. Is this possible with Lightroom? If so, how? Thanks

If you go to the View menu then select view options, make sure that one of your options selected is 'Cropped dimentions' . If you then click the letter i on your keyboard each time you will select the info setup from your view options from none to info1, info2 etc. When the cropped dimentions are displayed and you use the crop overlay button the cropped dimentions will change in real time.
Hope this all makes sense!

regards,

Keith
http://www.activeimage​photography.com/

Thanks for the quick reply. That's certainly helped, but the crop figures still aren't updated in realtime - you have to drag and release to see what the dimensions have become - they don't update while you drag, at least not for me That's still a big improvement on switching modules to check and back again

It would be nice if there was an input field to type the crop dimensions directly. Is there such a thing in Lightroom or do you have to do it the hard way, as above, by dragging and checking repeatedly? I also note that with drag and check I can't get an exact 800*XXX crop. The nearest I can get is 796*XXX or 801*XXX.

The only way I know of to crop dimensions (spelling correct this time) is when you export the image you have the option to specify the size you want.

regards,

Keith

http://www.activeimage​photography.com/

That's what I feared. Of course, the whole point of creating a 100% crop is to show the pixels unaltered from their original, not resampled/re-rendered. So resizing on export to jpeg completely defeats that purpose. So I'll have to crop to 796*XXX and export a 796*XXX image. Seems a bit lame to me

This morning I have been trying to find a way to make a specific sized crop as well, with no luck. tdodd, did you ever find a way to do this in LR?

I found a way to do this with a trick (it requires to make a blank image of a certain size) please check it out and see if it meets your needs.
https://www.youtube.co​m/watch?v=4wsoSeuF_4I

Thanks Andy, that's brilliant.

A not new, but good although cumbersome workaround. With, however, one glaring inaccuracy: the Info Overlay in the develop module shows the crop dimensions the minute the mouse button is released after resizing the crop box. No need to go to Library to see it.

Resizing the box is fiddly and not worth spending a lot of time on if "close enough is good enough". If an exact size is really needed, say 600x900 pixels, it is easiest to settle for something close, like 604x906 and then resize to 600x900 in export.

tzalman wrote in post #17230746
A not new, but good although cumbersome workaround. With, however, one glaring inaccuracy: the Info Overlay in the develop module shows the crop dimensions the minute the mouse button is released after resizing the crop box. No need to go to Library to see it.

Resizing the box is fiddly and not worth spending a lot of time on if "close enough is good enough". If an exact size is really needed, say 600x900 pixels, it is easiest to settle for something close, like 604x906 and then resize to 600x900 in export.

Though, you're still re-rendering those pixels upon export. If you absolutely must avoid that, you could export to something absurd like 10000x10000, and check the box that says "don't enlarge." And un-check all the other stuff that would cause re-rendering too, all the capture sharpening and noise reduction and export sharpening and and and....

I wonder how far you have to go to get it to export exactly as captured?
(raw conversion notwithstanding)

Raw conversion including demosaicing (camera captures only 33% of the color data, 67% is computer generated), profile assignment, conversion to XYZ space, conversion to working RGB space, WB application, conversion to output space, including gamma correction to 1.8, 2.2 or sRGB TRC. Probably some unpublished steps in there too, like exposure bias and a contrast curve. In other words, pretty far from capture.