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I usually 3d print with my Prusa i3 MK2.5 in ABS. I prototyped a part and found it to be useful, but needed it to be more durable. It's a small part that bolts into the plow attachment of my riding mower but on the back near where it clips into the normal riding mower tow point. Basically with...

Along the line of surface plates, I was at one point looking at import options. For my Prusa i3 Mk2.5, I could probably do a smaller 12x18"...however a ~$50 from Shars 18x24" Grade B, 3" thick (no ledge - these are thinner/lighter) would end up with starting just over $100+ for UPS Ground (from...

FDM you can probably set inserts into most printed bosses with a soldering iron. Not sure how much smaller to size the boss. SLS is probably a bit like FDM when it comes to melting plastic, so you should be able to set an insert into a boss with a soldering iron. SLA sounds like that won't work...

A couple years ago I built the i3 MK2S after leaving it in the shipping box for a few months. The parts were bagged nicely to line up with the major sections of build steps and it was easy enough to follow along though for that model there were lots of nuts to put onto all-thread in the right...

That's some timing on the screen shot, I didn't see that option on the first site I pulled up (all3dmakers). Either way it looks like you would get the fun of assembling the printer, even if it is one time with all of the pre-printed upgrade bits, or twice if you do the stock build and decide...

As far as enclosures, since some of the extruder fan parts and axis motor holders and things are 3d printed it is kind of important to not add a heater. For the most part the PSU and other electronics will be fine in a basic enclosure which might keep the inside air around 35°C or so...but if...

From checking the page source, it looks like Internet Archive BookReader at https://openlibrary.org/dev/docs/bookreader License terms, code and examples are at https://github.com/internetarchive/bookreader One of the developers has a blog post describing how it is put together which might help...

I'm also finally trying some IR. I'm finding that an 87C filter picks up light in a workable way on my 7D. And these sorts of photos need lots of work. This has some channel swapping and adjustments to get this look. And the same scene, normal color view.

Alaska. Caught this one in the morning.

Morning reflection.

I've worked with a computerized mount a bit this year, and had some time to throw my DSLR on top of it. Ambient lighting was not good with nearby lights. Just a stack of a few 300mm f/4 mid to high ISO 30 second exposures of M31, Andromeda Galaxy.

Nice photos, I kind of like the wide tire that looks like it is moving. The supercharged cars are nice and I'd love one, but most of the older cars I remember didn't have their engine compartments filled out. As far as going, I have been in the past, but didn't go this year. And didn't make...

Yes, this was an Antares Rocket carrying CRS-3. http://www.nasa.gov/mission_pages/station/structure/launch/orbital.html

This was from my remote camera...I had composed and exposed for a different shot, but things changed kind of quickly.

A couple photos of a rocket launch from last month. The first photo is from my P&S camera since I couldn't reach this far with my DSLR. There was a bit of wind so the smaller camera fared better on my tripod. For the launch I got closer and camera roles changed. This is 20d + 1.4x TC +...

I like how this picture turned out; ghostly. It makes me want to keep on looking to see what I may have missed, and keeps me thinking on what I might be seeing.

A few from yesterday/today...

Isn't SAGE maintained by UW? I have used it a few times to get functionality similar to Mathematica Notebooks, though eventually it didn't do what I needed for engineering classes. Worked pretty good for other math and visualization though. As far as programming, I think the initiation...

northrop: I was working with a few new ND filters recently...it turns out they were rated in optical density and not F-stop reduction. They were a little on the strong side... :p (they wouldn't exactly fit on 35mm equipment though) As far as the effect that you have here...wow. I would have...

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This page is filling out with all sorts of NASA stuff. :)

Something I found tonight that is quite a bit faster than a U-2...

Cool project, thank you for sharing! I'm a bit interested in these builds because I'm thinking of putting together a CarPC/datalogger next year. So far I have considered using booksize (barebones) computers, but I am not sure about the 19v input. And they would still seem to draw a fair...

Hidden in sight...a NASA ER-2 (non-military U-2S):

My UPS shows 60 watts while recording ATSC (DTV). Including my projector, it is at 258 watts while recording. Running the processor up, HTPC+Projector draws 294 watts. Celeron E3300 @ 2,66GHz, 2GB RAM, Radeon HD 5570, Hauppauge HVR 1250, 1x 5400RPM Hard Drive. Espon 705HD Projector w/ bulb in...

I provide technical services to use sounding rockets for low-cost access to space. Some of the rockets we launch are simple enough that the hazard areas are small. When those launches also don't have photography restrictions, it is fun to go watch:

Fun at work: With a 70-200mm f/2.8 :eek:

I mentioned using 2 CP filters to produce a variable ND filter...I have since read that 1 of the filters needs to be mounted in reverse for this to work properly w/ 2 CP filters. Or to use 1 Linear Polarized and 1 CP filter (I think order makes a big difference). There may be a blue cast to...

I have a Pioneer VSX-520, and that receiver doesn't pass through the native resolution on my Epson 705HD projector (1280x800). The only way to get it to work is to output 1080p and configure the video driver to underscan or pad the video with a border to end up with a 1280x800 video centered in...

A Circular Polarized filter is another option that is a bit more exciting than a Neutral Density filter - it would cost a bit more than a single ND filter but has other interesting features that might balance out the single-purpose of a plain ND filter. A CP filter cuts about 2 stops of light...

It sounds like you need to install Canon's EOS Utility and get that working properly first. From there you use its Live View functionality to bring up the video stream over USB. After that you may have a shot at using the video 'live' - there appears to be a few ways to accomplish it once you...

My Sigma 70-200mm f/2.8 (EX) is on my Canon 20d 99.9% of the time. Unfortunately for the past 2 years, that means it was the lens that was on the camera as it sat in my backpack. For shooting, which I've started doing again...I'd rather tote the 70-200mm around than my Canon 85mm f/1.8. Both...

We finally had a launch on the launcher closer to the observation site. I really wish I had something a little bit longer than my 70-200mm...to get closer in, not to stand back more :p This one made it up 388,298 ft:

I think it has to do with global regions for language/localization purposes...given the size of those files I hope you picked the right language: AM (Americas) EMEA (Europe, Middle-East, Africa) AP (Asia-Pacific)