ffutures: (Default)
A lovely Canadian video of the eclipse looking sort of demonic here

https://apod.nasa.gov/apod/ap250401.html

Eclipse

Mar. 29th, 2025 10:28 pm
ffutures: (Default)
Today's eclipse went reasonably well - mostly clear sky apart from a couple of intervals of light cloud. I ended up testing two lenses on two cameras - a Sigma 175-500mm f5.6 zoom on a Nikon body, and a Tamron 500mm f8 on a Sony A7 full-frame mirrorless body. I had to rule out the 28-300mm Tamron early, it just wasn't giving anything like as good results. This left me juggling two cameras and two lenses, both of which need the only 82mm eclipse filter I had, which led to a few problems as I repeatedly swapped them - fortunately I didn't quite point a lens without an eclipse filter directly at the sun, but I came pretty bloody close. There were a couple of problems with the Sony - I'm a lot less used to it than I am to Nikon and I was using it on a tripod, with the rear screen folded out, rather than at eye level, and I'd made a couple of idiot mistakes - I forgot to check that the clock was right (it wasn't) which is annoying for anyone who wants to check the timing of the eclipse, and there was a bit of grunge on the sensor that was visible in a couple of the photos. I was hand-holding the Nikon, mostly because I'm a lot more used to that and I only have one big tripod.

Results for both cameras were pretty good - the Sun looks bigger on the Nikon if I use the whole image, because of its smaller sensor, overall I think the Sony and mirror lens were slightly sharper but there really isn't much in it. Photos below are from the Nikon:

Just after the start



Maximum (some cloud)



Just before the end



Rest of the photos here

https://www.flickr.com/photos/150868539@N02/albums/72177720324741686/

I think that if I do go to Spain for the total eclipse next year the Sony and mirror lens might be the best choice, but I could get either camera and lens and a tripod into cabin luggage if I don't take too much clothing. If I go by a route that lets me take more than cabin luggage I'd take both cameras and lenses, a couple of sturdy tripods, and remote controls so I can use the cameras hands-off as much as possible.
ffutures: (Default)
There's going to be a partial solar eclipse visible from the UK tomorrow, visible from London for a while

Partial begins - 29 Mar 2025, 10:07:25
Maximum (about 30%) - 29 Mar 2025, 11:03:27
Partial ends - 29 Mar 2025, 12:00:50

This will be more visible further west and especially in parts of Canada which will have very close to a full eclipse.

For full details see https://www.timeanddate.com/eclipse/solar/2025-march-29

Assuming the sun is actually visible I'm going to be trying the lenses I have eclipse filters for (two zooms and a 500mm mirror lens), mainly as practice for next year since tomorrow won't be hugely impressive.
ffutures: (Default)
There's going to be a partial solar eclipse visible from the UK on Saturday March 29th next year, visible from London for a while

Partial begins - 29 Mar 2025, 10:07:25
Maximum (about 30%) - 29 Mar 2025, 11:03:27
Partial ends - 29 Mar 2025, 12:00:50

This will be more visible further west and especially in parts of Canada which will have very close to a full eclipse.

For full details see https://www.timeanddate.com/eclipse/solar/2025-march-29

There are also total lunar eclipses on March 14th and 7th September but very little of them will be visible from the UK, and a partial solar eclipse on 21st September that's only visible in the Antarctic and the southern tip of New Zealand.


Further ahead, Britain will be just outside the 100% totality zone for a total solar eclipse on the evening of 12th August 2026, with 90% totality visible - 100% totality in Greenland, Iceland, Portugal, Spain and Russia. I may be looking at cheap flights if I can afford it and it doesn't conflict with something else. Full details here

https://www.timeanddate.com/eclipse/solar/2026-august-12



ffutures: (Default)
Despite generally horrible weather yesterday it turned out to be a fairly clear night, and I turned my new (my Xmas present to myself) long lens, a Sigma APO 170-500, on the moon, the first time I've seen it really clearly this year. This is the first lens I've had that can actually autofocus on the moon, which is a great time-saver, though I had to set the shutter speed manually and bracket a lot, since metering really doesn't work that well on small bright objects on a black background.

The three photos show the moon at 175mm, at 500mm, and at 500mm with a 2x converter - I didn't think this would work, and I did have to focus manually, but the results are slightly better than simply blowing up the 500mm image. All pictures are the full frame (APS-c size).

Picspam )


Better than I've managed with previous lenses, and easier to use.

ffutures: (Default)
I think this may be my best so far - Vivitar 100-500mm zoom + Jessop 2x converter on Nikon D7000

Picture of the moon from London, 6th October 2023

This isn't cropped. The full-sized image is here:
https://live.staticflickr.com/65535/52409324086_f2b99c6040_o_d.jpg

ffutures: (marcus 2013)
Article about the DSCOVR observation satellite now at the L1 position a million miles from Earth, including time-lapse video of the Earth and moon.

http://www.wired.com/2015/08/satellite-took-incredible-photo-almost-didnt-leave-earth/

Mars Trek

Jul. 11th, 2015 01:03 am
ffutures: (marcus 2013)
Just saw this recced on the Oolite forums:

Mars Trek - interactive zoomable etc. Mars map, lots of features etc.

http://marstrek.jpl.nasa.gov/
ffutures: (marcus 2013)
Remember the Rosetta / Philae cometary mission?

Well, it appears that Philae was a tougher space probe than anyone thought...

http://news.sky.com/story/1501893/europes-comet-probe-philae-has-woken-up

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