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Forum: Monthly Photo Contests 05-02-2015, 06:09 PM  
Purple Skein
Posted By jford
Replies: 17
Views: 1,085
Not the most fascinating of subjects - but dealt with very well, with a colorful, flowing composition.
Forum: Monthly Photo Contests 05-02-2015, 06:08 PM  
Himalayan Poppy
Posted By jford
Replies: 20
Views: 1,496
Amazing! Wish I could do that.
Forum: Monthly Photo Contests 05-02-2015, 06:05 PM  
Pink Flower
Posted By jford
Replies: 3
Views: 314
Beautiful colors, excellent sharpness, good isolation.
Forum: Monthly Photo Contests 05-02-2015, 06:04 PM  
Hot rod
Posted By jford
Replies: 5
Views: 262
Great color, nice composition.
Forum: Monthly Photo Contests 05-02-2015, 06:02 PM  
Inkie
Posted By jford
Replies: 6
Views: 330
I prefer dogs - but this is terribly engaging and quite well done.
Forum: Monthly Photo Contests 05-02-2015, 06:01 PM  
Sammy
Posted By jford
Replies: 4
Views: 305
Certainly fills the frame, and the eyes connect with the viewer.
Forum: Sold Items 08-18-2014, 06:06 PM  
For Sale - Sold: SMC Pentax-A 35-105 f/3.5
Posted By jford
Replies: 5
Views: 1,222
PM sent
Forum: Photographic Technique 04-25-2014, 04:47 AM  
A question about white balance
Posted By jford
Replies: 7
Views: 1,083
I thought I had. The LED lights are sufficiently intense and close to the plate that the window light IS insignificant; the room lights are on continuously, so there is no variation, there is "no striplight and no incandescent and no halogen - other than the lighting you light the experiment with."

Actually, we've been using a dark background on recent trials and we're getting much better consistency in the exposures and color balance. Previously we used a white background; the media is a light tan, so the whole frame was pretty much high key. Now it averages to a medium gray, which I think is being handled better by the camera.

Thanks anyway.
Forum: Photo Critique 04-15-2014, 04:07 PM  
People WWYD - Concerts
Posted By jford
Replies: 2
Views: 453
What would I have done differently?
My images would have been less nicely focused, less accurately exposed, and definitely blurry, poorly composed, and much less interesting. THESE are pretty darned good, IMO. WAY better than I can do. I just want to say thanks - nice images.
Forum: Post Your Photos! 04-15-2014, 04:04 PM  
Landscape New Market battlefield barn
Posted By jford
Replies: 2
Views: 413
I like the sharp demarcation of the dead grass and the live grass. I do suggest you crop a bit off the top, though. IMO, the sky adds no interest and the nearly half-way horizon is a bit staid.
Forum: Photo Critique 04-15-2014, 04:01 PM  
Architecture Filth
Posted By jford
Replies: 3
Views: 475
Thoughts - interesting project starting there. Advice - keep at it. Nice compositions. Effective post work, IMO.
Thanks for sharing.
Forum: Post Your Photos! 04-15-2014, 04:00 PM  
Landscape Birds of the Day Pt.1... Grackles and Redwing Blackbirds
Posted By jford
Replies: 5
Views: 455
Nice shots - good saturation and nicely crisp. I'm partial to redwing blackbirds, so my favorite is that second, but (s)he does look cold!
Thanks for sharing.
Forum: Post Your Photos! 04-10-2014, 05:24 PM  
Nature Amidst the Pine Cones
Posted By jford
Replies: 10
Views: 520
Nice. I like the rich colors and the crisp detail.
Thanks for sharing.
Forum: Photo Critique 04-07-2014, 06:29 PM  
People Soak up the sun
Posted By jford
Replies: 12
Views: 951
Great detail, and excellent capture of the textures.
Also love the look of contentment.
Thanks for sharing.
Forum: Post Your Photos! 04-07-2014, 06:27 PM  
Machinery Crane
Posted By jford
Replies: 2
Views: 359
Nice work. Great composition, IMO.
Thanks for sharing.
Forum: Photo Critique 04-07-2014, 06:25 PM  
People Blue Red Black
Posted By jford
Replies: 22
Views: 1,357
Very nice. My favorite is the third shot, with the second a close second. The third, because I love the way the scarf follows her contours, and the second for the mysterious atmosphere. The others are good, but I rather like the blue color better than the red or black lace.
Thanks for sharing.
Forum: Post Your Photos! 04-07-2014, 06:22 PM  
Nature Flowering Quince Branch on a rainy day
Posted By jford
Replies: 2
Views: 392
Nice shot - beautiful colors, nice composition.
Thanks for sharing.
Forum: Post Your Photos! 04-07-2014, 06:21 PM  
Landscape Aussie Trev Day 3, Just Another Sunset
Posted By jford
Replies: 11
Views: 538
Beautiful shot. You haven't lost your knack.
Thanks for sharing.
Forum: Photographic Technique 04-05-2014, 08:48 AM  
A question about white balance
Posted By jford
Replies: 7
Views: 1,083
I knew this, but it shouldn't cause shot-to-shot variation.



THIS, on the other hand, I didn't know. Thanks.



No can do. Too much heat, dries the agar within 24 hours. Our culture is sitting uncovered in a sterile (well, sanitized) environment. Otherwise condensation on the lid obscures the imaging. I may have to resort to a xenon flash.
Forum: Post Your Photos! 04-04-2014, 07:13 PM  
Nature Redbud Tree
Posted By jford
Replies: 2
Views: 271
It is beautiful, particularly the way you framed it again the blue in the sky.
Nice job.
Thanks for sharing.
Forum: Photographic Technique 04-04-2014, 07:06 PM  
A question about white balance
Posted By jford
Replies: 7
Views: 1,083
Yes, and while the lab is about 15 m x 10 m and the camera system is approximately 15 m from the windows, that might be an issue. I've "locked" the room lights on because I found (quickly) that there was a huge difference if someone turned the lights off during the run.

I CAN try blocking the windows if other things don't work.

Thanks.

---------- Post added 04-04-2014 at 10:10 PM ----------



Yeah, this is one of the things I'm considering. I chose "auto" on the initial runs out of laziness, but I'm going to set the exposure and balance manually for the next trial. It seemed to me that the issue was most likely the camera, not the actual color temperature/intensity of the lights. But I wanted to get some other ideas too.

Thanks.
Forum: Photographic Technique 04-04-2014, 04:04 PM  
A question about white balance
Posted By jford
Replies: 7
Views: 1,083
I am using gphoto2 to take a series of photos of a culture in my lab. The camera is an Olympus C-700 (very old, but I had it and wanted to put it to use).

The culture is lit by two 13 W LED lights, continuously outputing about 800 lumens each. The frames are being taken every five minutes.
The image is mostly a white (ish) background, with some gray concentric circles, and a slowly growing yellowish-green fungus. The camera exposure is automatic, as is the white balance. The on-camera flash is not used, so the camera must think it has enough light.

I've noticed that successive frames have slightly different appearances - the white balance or perhaps the exposure seems to shift about. I haven't looked in detail at any histograms (my first experiment is still running) and I don't have an example image to show right now. Sorry.

Why would there be visual differences in a sequence of images taken of the same subject, lit by (presumably) constant lighting? Is it necessary to run the lights off a constant voltage transformer, do you think? Or is it simply that I'm asking more from my poor old C-700 than it's really capable of? Not really eager to dedicate my K10D to the lab, but I suppose I could try a sequence with it...

Thanks in advance.
Forum: Digital Processing, Software, and Printing 04-04-2014, 03:43 PM  
Speedy White Balance adjustment of 1,000 photos
Posted By jford
Replies: 10
Views: 1,087
Gimp can do it.
corrinado swam: Batch Script GIMP Auto White Balance Auto Levels

Actually, I was about to post the same kind of question, but searched and found your first. Thanks.
Forum: Post Your Photos! 04-02-2014, 07:43 PM  
Nature Finch at the bird bath
Posted By jford
Replies: 2
Views: 414
I know it isn't, but from this angle, it looks a bit like a member of the parrot tribe.
Very lovely capture of the texture.
Thanks for sharing.
Forum: Post Your Photos! 04-02-2014, 07:42 PM  
Nature visiting Tom
Posted By jford
Replies: 2
Views: 304
Oooo...thoughts of Thanksgiving...mmmm, crispy skin, rich smell, juicy...
Sorry. Distracted.
Seriously - great shot. Not the easiest bird to get a clean image of. Good work.
Thanks for sharing.
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