Відео

F2?! Thats such a waste. How mu...er...little magnification does that get?

Yeah the "Standard Handbook of Telescope Making", the big old hand saw cutting out the lap. The uglier the lap the better! I've tried pretty laps and they are always more of a hassle.

What about using porcelain tile? I hear it lasts longer than ceramic. Have you used it?

So much fun to watch. I've learned so much about what it takes to make a premium mirror. Great stuff Gordon...thank you for sharing!

Love these videos Gordon! It almost makes me want to grind one myself! Well, almost. It's great to see how it's done!

Straightforward, simple design. Nice large bearings made of wood. Excellent dampening when you build with wood. Beautiful scope! If I ever settle down in dark sky country I would seriously consider spending the money to have a scope like this permanently in place. You do very nice work, and from what I've seen from your mirror making workshops, Zambuto quality optics!

Wow！

Hello colleagues! ua-cam.com/play/PLHSZI34SXdPY7VXB-GiEYbZVLMMY1edRS.html

Hi ,I am from Poland. I started my journey with mirrors for teleskops. I have a question....do you still nade teleskops mirrors?

Does the tile side curv such as required sagitta?

I have a question, how do you parabolized the mirror? I mean, with those movements you did on the video is what makes a circle surface become in a parabola surface?

Nope, there’s an easier, better and more accurate way of doing this. Thanks for trying.

That’s a really good tip!!! Just tried it and I did some extra reference points and it was surprisingly accurate. Great for general DIY. Thank you for sharing.

For that money I can get a „goto“ telescope with the same optical quality, I want a telescope and not some furniture from IKEA

I suppose you are using green LEDs today, or even a green LASER

Gordon, can I ask what motor and speed controller you used in your machine? I was looking at using a drill press motor for the machine I'm building, but having the ability to quickly & effortlessly change from low speed to high speed would be a huge plus.

Have you ever used diamond paste?

RIP RadioShack 12:52

Мне интересно, столько видео о том, как сделать зеркала для телескопов, да ещё такие здоровенные, только я нигде не вижу сами телескопы с ЭТИМИ зеркалами?

Brilliant! 👍

Wonderful work... best regards from Santiago de Chile.

4 minutes is not that easy

So, the bottom of the page is a chord, and the mark at the bottom is the centre of the chord, and the mark at the top (From top to bottom) is a line at 90° from the cente of the chord... That simplifies a method I saw recently. Thanks, saved...

Hi, I just made my first grinding tool out of dental plaster based on the video I found here (thank you very much!!!). But, unfortunately, the tool warped significantly after pouring, during or after solidification. The center of the tool rests in the middle of the mirror, but the edge is curled up, so it wobbles around the center (more than half a millimeter on the edge!). If I drop it on the mirror like this, only the center works, therefore it deepens the glass disc too much, so the focus will be shortened. Has anyone else experienced this warping or distortion phenomenon in the case of grinding tools made of dental plaster? I suspect that the change in volume of the plaster (even if it is minimal) becomes uneven due to the steel or ceramic pieces inserted in it, and this drags its shape: the lower part cannot contract as much due to the metal pieces as the upper, homogeneous part, and this pull up the edge of the disc. How thick should a plaster tool be made so that it does not warp like this? Thanks a lot in advance, Attila

hermoso telescopio, pregunta, cual es su valor?$. gracias

Here are two much simpler methods, measure across the circle and find the highest measurement, then mark each side of the highest measurement and draw a line across, bisect the line and you have the centre point. (2) Draw a line on the outside of the circle just touching the edge, with a square draw another line at 90 degrees so it also just touches the outside of the circle, repeat this so that you have a perfect square on the outside of the circle then draw two lines from corner to corner of the square and where they intersect is the centre of your circle.

Where do you get a glass blank for homemade mirror anyways

Greetings, are you still available? And do you grind and figure optics for Maksutov-Cassegrain telescopes? Im on a journey to make my own Mak-Cass astrograph so im searching for someone willing to grind the corrector and mirrors, the corrector is 200mm and the primary mirror 208mm the overall focal ratio I am seeking is around f10-12 depending on what of those two end points give better correction to cover a full frame sensor.

I'm confused....why didn't he just make F5.....why specifically F4.9....what does that 0.1 difference make? Somebody please explain.

What does f/4 mean?....can anybody explain please?

is it feasible to re use that spent abrasive? As in putting it thorough a mesh so particles of only one size are present then use it as a finer abrasive.

Is it a good idea to neutralize the etchant with baking soda on the mirror? That would precipitate iron oxide and hydroxide particles that could etch or scratch the glass, Ive seen how a rusting nail stains and etches glass. I would say its better to rinse the mirror with slightly acidified distilled water (vinegar or citric acid) first and then after that a good rinse of pure distilled water no need to risk damaging the surface with iron oxide particles.

So how exactly does that grinder wheel lead to the desired curvature?

where is the video to coat it again with aluminium?

Good day! And this tool with nuts is it flat or already convex for the required ROC ? Thanks!

Erm, abrupt ending though. I was hoping to follow this mirror to completion, but it looks like things end here for this one?

Thank you!! simply genious! 😘

جميل جدا

جميل جدا

do you correct these, or are they for viewing only?

This is an awesome version of the Canadian made Flat-Master!

Thank you so much for this very informative video. Made it very clear and understandable.

Hi Gordon: Great video and enjoyed watching. I haven't made a mirror in years and would like to try it again. My first successful grind was done back in the day with Edmund Scientific telescope mirror kit. Can you please tell me where I can find a suitable starter kit to make an astronomical mirror 10" short f value for wide field viewing. Best regards. David

If you had a 4 inch diameter circle what size paper would you use? Would I use a 2" length paper?

This is a true craftsmen, amazing work.

Question for you Gordon (others feel free to comment as well). I've recently started hogging out a 12.5" blank by hand. I've made a similar 6 inch tool as to the one used in this video and I am just using TOT/COC strokes and rotating mirror and tool every so often. I'm not allowing much on overhang but I am sure some is happening. Progress is going well, getting about 0.2mm of depth in the center for about every hour or so of grinding. However I am getting a bit of chipout on the edge mainly on the bevel (~1/8" bevel) itself. They're rather small and none that protrude inward on the facial surface of the mirror more than 1mm or so. I don't feel they're catastrophic and could probably be ground out and compensated for later on with rough grinding with a ceramic tile tool when the time comes and a bit of rebeveling, but I did want to ask if this is normal/expected? Despite your efforts to reduce the chipout using the methods/tips in this video, do you still get some here and there? Any feedback would be greatly appreciated. Gerald

I’ve always wanted to try this.

Brilliant!

Nice! Just what I was looking for! ❤