collinsmark's latest activity
-
-
collinsmark replied to the thread Today I Learned.Yep. ISBN (numbers) for books have a similar thing going on with the check digit. (ISBNs are book identifiers. They're useful for...
-
-
TIL about the Luhn algorithm and how it is used in determining credit card numbers in order to catch common typos...
-
collinsmark reacted to Andy Resnick's post in the thread Our Beautiful Universe - Photos and Videos with
Like.
Just on the off chance you have some ideas... I have a good example of the underlying problem I am having with trying to use flats flats... -
collinsmark reacted to timmdeeg's post in the thread Our Beautiful Universe - Photos and Videos with Like.
Wikipedia: Messier 83 or M83, also known as the Southern Pinwheel Galaxy and NGC 5236, is a barred spiral galaxy<a...
-
Oldham sunsets and sunrise
-
collinsmark reacted to OmCheeto's post in the thread Are Conventional Turkey Thawing Instructions Backwards? with
Haha.
I'm starting to regret restarting this thread.... Where is MIH when you need her? -
collinsmark replied to the thread Random Photos.Thanks! :smile: Did I mention that Balboa Park also has a Natural History Museum? https://www.sdnhm.org/exhibitions/dino-jaws/
-
Looks like something out of Jurassic World, minus the dinosaurs!
-
Really excellent photos- both compositionally and technically (exposure, etc)- thanks for posting!
-
collinsmark replied to the thread Random Photos.... Continued from previous post (this post is part 2 of 2). Figure 7. "Broken bulb." 50mm Summilux-M ASPH @f/6.8 Figure 8...
-
-
collinsmark replied to the thread Random Photos.November 2025 Balboa Park pics (Part 1 of 2) After running an errand in Balboa Park late Saturday afternoon, I decided to do some...
-
-
It happened to me back in 2012. Post in thread 'Google Street View: How Long Are Updates?'...
-
collinsmark reacted to OmCheeto's post in the thread Are Conventional Turkey Thawing Instructions Backwards? with Like.
It's been 5 days since I put my bird in the fridge and the surface temperature is only up to 34°F. Anyone know the sigmoidal equation...
-
collinsmark reacted to mcastillo356's post in the thread Are Conventional Turkey Thawing Instructions Backwards? with Like.
Have a nice Thanksgiving Day!
