A swarm in May is worth a bale of hay…

A swarm in June is worth a silver spoon.

So the saying goes. This was my first of the year, on 31st May. I reckon that counts as June 🙂 It was a fairly large swarm, too. Now safely tucked away in a new hive in my apiary…

swarm

Posted in Bee-keeping, Smallholding | Tagged | Leave a comment

DSO Imaging with a 127 Mak

It’s often said that slow focal ratio telescopes are unsuitable for DSO imaging and in the general case I’d probably agree. However, having seen a few other imaging attempts with a 127 Mak I thought it might be interesting to give it a whirl and see how well I could do if I chose my targets carefully enough.

At the tail end of May Messier 13 was well-placed in the sky, so with my 127 Mak on its EQ3-2 with dual motors and my Canon 450D I had my first go. In terms of time spent I can’t claim it was a major success. Even with thirty second exposures I ended up having to throw away about half of them due to trailing stars, but from the fifteen or so left I managed the following image:

m13-2-final

Better tracking is required for better and less noisy images, but that’s probably not going to be easy with an EQ3-2.

Posted in Astroimaging, Astronomy | Tagged , , , | Leave a comment

It’s been a busy summer…

And I’ve had little time to write up what I’ve been doing, so now the autumn is well under way I shall be catching up with details of the last three or four months…

Posted in Uncategorized | Leave a comment

One Swallow does not a summer make…

But lots of them is really quite impressive. Especially when you can get up close.

Just went out to feed some scraps to the chickens with my daughter and saw a number of swallows tearing around the trees in the orchard and a stand of sycamore nearby. They were almost impossible to count, but I’d estimate there were at least two dozen, perhaps three. Swooping in and out of the trees catching greenfly that were feeding on the leaves.

So we quietly walked up under the sycamore and lay on the grass watching them swoop within no more than a foot or so of us. Against the sky or the solid dark background of the leaves it was possible to pick out a single insect and watch it until a swallow came close enough to see it and pick it off. As the number of insects died down we prodded the sycamore leaves with a stick and another shower of greenfly would drop from the trees for the birds to feed on.

Stunning to watch, especially with the birds flying so close to our heads.

Posted in Environment | Tagged | Leave a comment

Enough of the demonising of private schools

I see today that yet another person (the Chief Inspector of Schools, this time) is taking a cheap pop at private schools in a poorly-veiled effort to grab a few headlines. One more strike against the privileged on behalf of the rest of us, brother.

Bullshit.

My children attend a private school. My wife and I chose, somewhat reluctantly, to send them there because the local school had so few pupils that it was on the verge of becoming unsustainable. The last year my son was there he was about to become the only boy in his year group. We looked at the other local school he might have been able to attend and frankly weren’t very impressed at all.

It’s my deeply-held belief that a good education is one of the most valuable things you can provide for your child and I’m happy that’s what they’re getting at the school they now attend.

In order to pay for this we’ve not “dipped into the family trust fund” or rented out some more property or other. Between us we earn fairly close to the average family income for the UK. Average, note. To be able to afford it we’ve made as many sacrifices as are necessary. We have one car between us. A ten year old estate car that’s done about 130,000 miles, but we keep it going because we can’t really afford a replacement. We have holidays, some years, but more often than not it’s the odd week camping in Cornwall and many times I won’t go because I need to work. This year is a bit unusual as we’re driving over to France! We don’t have Sky or any other pay television (and our television is probably fifteen years old). We don’t go out very much. We don’t spend much on clothes (and most of that is on clothes for the children). It’s not always easy and sometimes I’d love to get a builder in to do the odd job or two, or go away without having to worry about how we’ll pay for it, but I can live with my choice and I’m not complaining about it. What I do object to is being smeared with the image of some loaded hooray by people who are far better off than me and who don’t have the vision to see past the end of their nose or the intellect to imagine that the world might not actually be the way their prejudices suggest.

So, next time some minister or other government representative wants to have a pop at private schools, perhaps they should come down here first and explain how we’re so privileged to have given up (or to never have had) so many of the things they take for granted in their cushy little lives.

And if they really, genuinely object to people having the “privilege” of being able to pay to get a higher standard of education than is available from the state then instead of whining about it to get a few cheap headlines, how about making it unnecessary for the likes of my family to even consider private education. Raise the standard of state schools to match. Allow the teachers to do the job they’d really like to do and pay them what their job is really worth. Treat them as if our future was in their care instead of crowd control for children. Now that would be a real privilege.

Posted in Random | Leave a comment

Ghosting problem on Moon images solved

I hope I have now resolved my problem with ghosting appearing on lunar images with my 450D. I finally had a night with a clear period long enough to take subs of the Moon at multiple exposure times. First I tried 1/1000th @ ISO800 which is what I have used up to now, then 1/500th @ ISO400 and finally 1/200th @ ISO200.

Whereas I was hitting problems with ghosting on the 1/500th and slower frames before this time I configured APT to use a two second delay after locking up the mirror before opening the shutter. This completely eliminated the problem and I managed three clean images at all three exposure lengths.

1/1000th:

moon-2013-05-16-01-small

1/500th:

moon-2013-05-16-02-small

1/200th:

moon-2013-05-16-03-small

To confirm I also shot a few frames of 1/200th without the mirror lockup delay and approximately half the frames showed a ghosted image.

I’m happy with this now and have started shooting all the subs for lunar images using exposures of 1/200th @ ISO200. I think the results have definitely improved compared with those I took previously using the 1/1000th shutter speed.

Posted in Astroimaging, Astronomy | Tagged , | Leave a comment

My first piece of astronomy-related lathework

I’ve been wanting to tinker with Mire de Collimation to collimate my dob, but I didn’t have any handy way to fit a webcam into the eyepiece holder without removing the lens. So I found a lump of waste (and not great quality at that) aluminium and turned myself an adaptor. It’s nothing special and not actually even the most complicated thing I’ve made so far, but it’s the first piece of work I’ve done for astronomy on the lathe since I got it all set up and started teaching myself to use it a couple of months ago, so I’m feeling a little pleased with myself.

camera-fitting2

The barrel of the piece even has a taper inspired by those found on Explore Scientific eyepieces so it won’t get caught on eyepiece compression rings. The shoulder at the end of the taper is the same diameter as the end of the barrel (1.25″) so it shouldn’t be pushed off-centre when tightened up in the eyepiece holder.

Posted in Astro Equipment, Astronomy | Tagged | Leave a comment

Impressive new solar active regions

Whilst still relatively quiet, the Sun showed some impressive new active regions last week, apparently associated with quite large flares. Here are my white light images of the newer regions.

First, AR1745:

ar1745

AR1746:

ar1746

And AR1748, just after passing around the limb:

ar1748

Posted in Astroimaging, Astronomy | Tagged | Leave a comment

Adobe ripping off UK users?

I read on the BBC News website yesterday that Adobe was moving to subscription-based charges for its software and “Creative Cloud” (whatever that means). If you’re in the UK though, it seems like you get stitched up on the pricing compared with the US.

From their website for the US “complete” individual subscription the price is $49.99 per month — about £32.50 at today’s exchange rate. For a UK user the price is £46.88 per month.

On an annual basis that’s about £390 for the US, or £562.56 for the UK, a difference of £172.56. Obviously it costs far more to get those electrons over the Atlantic to UK users than within the USA.

Oh, I forgot. There’s that massive 20GB of storage, too. I can generate more data than that in a single night. What a gimmick.

I can’t work out whether Adobe just think their UK customer base is stupid, or if they just fancy trying to rip us off. Well, Adobe, you’ll be getting no more of my cash. I’d rather donate some money to the GIMP project and use that than help fill the coffers of a company that shows such disrespect for its own customers. Time to get your head out of the Creative Cloud.

Posted in Computing | 1 Comment

Ghosting problem on Moon images

I was experimenting with shutter speeds and ISO settings whilst imaging the Moon with my DSLR the other night and when I got down to a shutter speed of 1/250th of a second starting seeing a problem where the top of the frame had a “ghost” image whereas the bottom of the frame was fine. Here’s a crop of the bottom part of one frame:

framebottom

And here’s the top of the same frame:

frametop

I have frames taken at 1/500th and 1/1000th that don’t show this problem at all.

It’s been suggested to me that it might be caused by the vibration of the mirror moving, so I shall configure APT to pause after moving the mirror and see what happens.

Posted in Astro Equipment, Astronomy | Tagged , | Leave a comment