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RICHARD COFER

VdB 141 Ghost Nebula

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Posts Made By: Walter Hamler

March 17, 2004 06:16 PM Forum: Equipment Talk

Hutech Mount

Posted By Walter Hamler
2.2 lbs per kilo, so that's 6.6 lbs. Probably will be fine.

Walt

March 24, 2004 10:17 AM Forum: Deep Sky Observing

Mt. Pinos on Saturday night

Posted By Walter Hamler
Sounds like our star party this past Fri and Sat. We had almost a hundred folks show up and half as many scopes.

Walt

March 27, 2004 01:06 PM Forum: Telescope Making

Do you believe this

Posted By Walter Hamler
Phil, you and I both know there "ain't no way in h***!"
Maybe one in every 1000 mirrors will come somewhat close, but I don't how someone could advertise those results as typical.

Walt

April 2, 2004 01:01 PM Forum: Equipment Talk

DSC is installed in 2nd scope.

Posted By Walter Hamler
Floyd, question for you since you have the Sky Commander.
I am in the process of adapting my GEM for encoders so I can use dsc's, and the Sky Commander is the one I plan on getting. Because of space/size limitations, I will have to use the US Digital S1 size encoders, and they max out at 4096 ticks. On the dec encoder I will gear it up 2:1, so it will effectively be 8192, but the RA will be direct drive at 4096. Question: On the Sky Commander can you have two different values for the RA and Dec? I have downloaded the manual, and all it says is to input the values, but doesn't mention if you do it for RA and Dec seperately or a single value for both.
Also, will the resolution on the RA be ok with only 4096 tics? The only examples of dsc's in operation I have ever seen were with the higher values.
I appreciate any info you can provide.

Walt

April 2, 2004 01:11 PM Forum: Solar System Observing

Solar Film Material

Posted By Walter Hamler
I recently made a filter from the TO material to replace a Baader that I had sold. My initial response was I liked the color better, but I don't think it is as sharp as the Baader.

Walt

April 12, 2004 04:50 PM Forum: Telescope Making

Bungee Tension

Posted By Walter Hamler
Looks like a good idea. How many bungees is that, one or two? Do both sides have bungees or just one?

Walt

April 14, 2004 07:51 PM Forum: Telescope Making

Vibration dampening on a DOB

Posted By Walter Hamler
Floyd, the first area I would look at is the rockerbox/groundboard interface. The design on this unit is different than most I have seen where the groundboard is a solid piece, either square or round. How much surface area is in contact with the bottom of the rockerbox?

Walt

April 15, 2004 10:28 PM Forum: Film Astrophotography - Imaging and Processing

Reciprocity failure and ISO

Posted By Walter Hamler
Probably not but it would be an interesting experiment to compare a 30 min exp of each film type of the same object with identical equipment and conditions. I am sure that the differences would be obvious, but I really suspect that other differences would also pop up, such as color balance and resolution and contrast variations between film types. Sometime recently there were some rather nice astrophotos posted here that were taken with 100 speed color neg film, but I can't remember the exposure times.

Walt

April 16, 2004 11:35 PM Forum: Pictures of Me and My Telescope and........

Pinos, still cold but good.

Posted By Walter Hamler
Go ahead, rub it in Floyd!!
Actually, being here in sunny but unseasonable cool Florida, I don't envy you at all!!

Walt

April 17, 2004 02:11 PM Forum: Deep Sky Observing

Milky Way

Posted By Walter Hamler
http://www.anzwers.org/free/universe/index.html

Doedn't show all the m objects but a handfull.

Walt

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