[chupathingie]

Had to revisit this thread, just ’cause I’m jonesin’ . You got a second body? Hell, do the twofer.

I learned a lot on my last attempt. Higher ISO+ more subs= fruitless. After a certain point, anyway. I shot a bunch of 2 minute subs at 3200 and realized quickly when I loaded up the stack that math and physics were not on my side in the quest to cancel noise. My S/N was horrible. Just so folks know, 3200 is too fast for a 5DII in this application. The noise is unpredictable at this speed, or at least control escapes me. I haven’t figured a way to subtract the extra noise from the dataset; taking twice as many subs at “too high” ISO is less advantageous then going longer at a lower ISO. IE, 60 1′ subs @3200 looks worse than 30 2′ subs @1600. There’s a trade-off there that I don’t quite understand yet.

[chupathingie]

A standard flatbed scanner can do this (I’ve done this with my old 35mm film negatives). You need a matte for the originals, remove the top of the scanner and cover with either a lightbox (I’m using that term as an astrophotographer, not sure if it’s the same thing for you normal folks) or leave it open to the daylight sky or a well lit ceiling. You may have to adjust color balance using this method. It’s also important to put the emulsion side against the scanner glass or you may get blurring; you can always correct for image inversion if needed later.

edit: It’s important that the external light source be brighter than the light inside the scanner or the reflected image will overpower the transmission image. If you wanna tinker you can mask off the scanner’s internal LEDs to eliminate them entirely as a source of reflection.

[chupathingie]

That right there explains very well why I didn’t have much interest in photography until the digital age rolled around… the cost and delay of processing. Loved it as a kid, but then I wasn’t paying for any of it. DSLRs came on the scene just after I had managed to work myself into a position where dropping a grand didn’t seem too outrageous; especially considering the “processing” portion of the equation had dropped out.

[chupathingie]

hmmmm… put a drop of alcohol or acetone on the screw head and let it soak… one of those two usually loosens stuff like that. Only one will work, if either do, depending on what the cement is based on.

[chupathingie]

Wow. I was just about to start 10th grade and had just seen the ‘Dacks for the first time. Skylab had just come home, as it were. We still had the original Battlestar Galactica on TV. That was pre- Raiders of the Lost Ark, even! 😆

[chupathingie]

You’re the pioneer, get busy 😉

As far as I know, exploded diagrams for every Canon product are available to licensed repair personnel. They would make life so much easier. I know of one guy who might be able to help with that. My guess on the lens is that it’s likely more expensive to repair than what a new lens is worth, unless you DIY it.

[chupathingie]

Another.

There’s nothing you can take apart that ̶y̶o̶u̶ ̶c̶a̶n̶’̶t̶ ̶p̶u̶t̶ ̶b̶a̶c̶k̶ ̶t̶o̶g̶e̶t̶h̶e̶r̶ ̶a̶g̶a̶i̶n̶ someone else can’t make money from. Still, I’d even have a go at dismantling it. You never know what kind of MacGuyver can be pulled on it without looking inside first. You’ll either fix it, not fix it and reassemble it, or have kit parts for the next DIY contest.

[chupathingie]

better start driving! 😆 I’d say yes, but the first week is already full. You’d even have to rent/bring a jeep, a standard 2-wheel drive won’t cut it on the trails in Idaho… we have a wrangler, a moderately beefy 4WD Nissan truck for cargo and a Subaru Outback which I’m seriously expecting to have to park somewhere if these trails are anything like the others I’ve been on up there. I’m planning on the week after being an ad-hoc random drive around the Colorado Rockies and the forests/mountains of N. New Mexico. I’m thinking I want a higher rez shot of the Gunnison River thru Black Canyon, for starters… I’ve got the perfect wall for a 6ftX foot&1/2 hung vertically. I think the first few days of that week are gonna be spent on jeep trails looking for waterfalls, rapids and ponds to shoot. Hop a plane and I’ll meet you at Salt Lake! 😉 I’ve got a lot of choices for that area; Arches Nat’l Park, Canyonlands, Bryce, Zion…holy shit there are a million scenic areas to visit out there. My PCs gonna be crunching panos for weeks! 😆

So if anyone in the area wants to hook up and tramp around anywhere in like a 150-200 mile radius from 4corners, holler. N. NM is a beautiful contrast between high desert and forested mountains across the state. It’s really pretty striking the first time you see it.

[chupathingie]

Good enough UV block for terrestrial, but stars are bright in UV with a black (or considerably darker) background. Even with APO glass you see purple halos around them.

I wonder if a rear filter would be less prone to visible reflections?

[chupathingie]

Man, if I could block UV without reflections… saw the exact same thing doing a run of astrophotos. It tamed the purple halos, but at a price…

/cool pic. Conspicuously absent payphones, even.

[chupathingie]

Wow, a lot of great stuff posted here since I looked last! Rav, you were definitely in the right locale for things… those sunspot images are awesome! And yeah, a few ” of drift over a couple minutes is pretty tight…any tighter would need an autoguider.

Cause, I really like the cloudy shots…lends a lot of atmosphere to the images…

[chupathingie]

Damage plan FTW… at least he didn’t have to reimb-ursa them for the gear.

/God, I’m so sorry

[chupathingie]

Still going thru my shots… Nice shots, Fluffy! I’m torn between your first and third shots (of the actual eclipse, the first one you posted doesn’t count!)… I love the foreground. 🙂

[chupathingie]

here’s one of mine… ADS shot, just reduced. (ADS=Ain’t Done Shit)

[chupathingie]

If the clouds clear out, I’ll be heading a mile or two away to the edge of the world…er…edge of town to get a flat horizon at sunset.

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