First stop - Chiefland Astronomy Village
After a two-day drive, John Pratte and I rolled into the Chiefland Astronomy Village
on Tuesday afternoon, Feb. 17. I decided to set up the 20" F/3 near
Charlie Warren's 20" F/4.3 Starmaster, and we made camp and set up the
telescopes. Setup and collimation were uneventful, and I was becoming
proficient using the autocollimator, even tweaking primary adjustments
by myself. I took a shower, and we readied ourselves for the night's
observing. Tom Clark stopped by to see the ultra-short 20" telescope.
John Pratte (left) and Tom Clark give scale to the 20" MX telescope as the sun sets.
The first night of
observing yielded a clear, dark sky, and we quickly had fun observing
Sirius, barely spotting the Pup, and then moving on to M42, M46, and
various other objects. Charlie, Tom and other neighbors stopped by to
see the 20" MX, and they enjoyed seated observing. The immediate
verdict, after a small tweak of collimation, was that the 20" MX was up
to the task of being used under much steadier Florida skies. Saturn was
looking fairly good as it rose.
We had gotten in a good
bit of observing before Tom stopped by again and invited us to check
out his 42" telescope. He had just finished entertaining a group of
visitors. We enjoyed the bright views that this huge telescope can
provide, in a dome sheltered from the wind on this cool evening. Soon
afterward we went to sleep, pleased with our observing experiences.
Arrival of an FX
After a good night's
sleep, we had breakfast and were standing around when a pickup truck
pulling a cargo trailer pulled into the driveway. Out stepped none
other than John VeDepo, whose page about imaging and video astronomy is also featured on this site.
So, with John's 16.5" FX
Starmaster set up, at sunset the next day I decided to get some photos
of Charlie, John and I with our telescopes.
Charlie Warren and his 20" F/4.3 Starmaster, with superb Zambuto optics.
Warren (left) with his 20" F/4.3, John VeDepo (middle) with his 16.5"
FX, and myself (right) with my 20" F/3 MX. Note that John is not tall,
but he's not that short! He's the farthest away, Charlie is closer, and
I am the closest. We all gave each other plenty of space, because there
was plenty of space (unlike WSP).
John VeDepo is
shown at right with his 16.5" FX telescope. Notice how perfect the
eyepiece height is for him with the scope pointed at the zenith.
Wednesday dawned with
increasing clouds, and soon it was overcast. John had planned to use
the MallinCam in his 16.5" and the 20" MX, but it looked like mother
nature would thwart that plan. We hung around the field, then John P.
and I went shopping to get some food and lunch. We sat around, hoping
for clear skies, but it was not to be.
For dinner we went to a
local restaurant and I had all-you-can-eat fish. What else could I do
having just come from Illinois in February? As it became clear that the
sky was not going to clear, Tom invited us to his house for an evening
of interesting and spirited conversation.
I slept well, but woke up
to a morning storm, but my tent mostly stayed dry, as did all of the
telescopes, safely covered. The rain stopped as we had breakfast, and
the clouds began to break. Bands of clouds moved from the west
periodically, and little did we know that this would continue nearly
all of the next night.
As darkness fell John
set up the Mallincam, but that task was made difficult by passing bands
of clouds that rendered M42 invisible every few minutes. It was the
beginning of a night of frustration, but one which eventually yielded
some nice views of deep sky objects. We eventually imaged the Sombrero
(M104) in the 20" with the MallinCam, and that showed that the camera
could be used in an F/3 telescope with the focal plane positioned
normally. Charlie Warren found Comet Lulin early on Friday morning, and
that was about the last view I enjoyed before turning in, tired and a
bit frustrated by the weather.
Off to the Keys
Following a few days at a
friend's on the east coast of Florida, we headed for the Florida Keys
and the Winter Star Party. We arrived Monday afternoon and managed to
shoehorn our way into a campsite and find space on the berm for the 20"
MX. The 20" spent its days covered with a shiny cover that was a bit
too large, but which did the trick. Here's a photo of the covered
telescope and a photo that helps convey the atmosphere of the Winter
Covered FX telescope on the berm (left) looking like a fat cannon
wrapped in mylar, and a nice palm tree (above, obviously) to get the
feeling of what the Winter Star Party is all about for us northerners.
Six days, five nights
Well, what can I say -
it's all a blur and I hardly drank any beer. From 7pm to 1am on
Monday-Friday nights, it was the '20" F/3 MX show'. A line formed at
the telescope at dusk, and disappeared and re-formed throughout the
night. Breaks were taken to get hot cocoa, soda, just-out-of-the-oven
brownies, and to use the facilities. But, mostly, I was with the
telescope showing people things like Sirius and its companion, the Pup,
which was very, very, very easy to see. M42 and M46 were my favorite
showpiece objects, garnering many an "ooh" and "aah" from those who saw
recollections include Vic Menard's first look through the telescope.
After we discussed and tweaked collimation, he sat down, looked at a
star field and said "Frickin' incredible!" Can't say it much better
myself, Vic. I'm still stunned how well the telescope performs at F/3
with the Paracorr and Ethos eyepieces (Naglers at high power).
sets over West Summerland Key, and over my trip to Florida. Shortly
after this sunset the moon and Venus looked spectacular in the
excellent Florida seeing conditions.
So what did I learn? Well, here it is, in a few paragraphs.
First of all, this
telescope keeps up with any other telescope of similar size, without a
ladder. Views of deep-sky objects were similar to those in similarly
sized scopes. It was the planetary images that truly impressed me.
Saturn looked spectacular when the wind and seeing calmed down. Many
others agreed, and we watched six moons dance around it on one
particular night. The colors on the planet's disk were quite apparent,
and you could easily look through the gap in the rings. It simply
exceeded my expectations for planetary images.
Collimation held well all
week. I touched up the primary collimation on a couple of occasions,
but that was at most a 1/4 turn of a collimation knob. Collimation held
nearly perfectly from zenith to near the horizon, proving the rigidity
of the Starmaster structure and mirror cell. I was extremely pleased.
Omega Centauri looked spectacular the couple of times it popped out
between clouds and haze in the southern sky, as did Eta Carina and
Sirius B was a piece of
cake most nights. Stars were fairly sharp to the edge of the field even
with the 17mm Ethos, Paracorr set all the way in. The mirror showed
excellent correction so long as the Paracorr was set properly for the
eypiece that was being used. Star testing showed a smooth mirror with
generally good correction, so I was a happy optician.
The 20" Fx telescope ready for an evening of observing.
The moon and Venus looked
absolutely amazing as they set, close to each other on Thursday
evening, I believe it was. Numerous observers enjoyed the entire disk
of the moon, in razor sharp detail, in a 13mm Ethos eyepiece. I stared
for a long time at the tiny lunar features visible due to the long
shadows and the excellent seeing conditions. Venus was very large and
very sharp, by far the best view I have ever had. The edge of the
crescent was razor sharp when the seeing permitted. It was simply a
The Paracorr is clearly
near its limits at F/3. This is absolutely no surprise. The moons of
Saturn showed a little distortion as they got farther from the planet,
but this is to be expected when pushing the envelope. However, no one
had anything but amazement to share with the view of Saturn, and many
rated it above views provided by other telescopes. They just couldn't
believe they were looking at Saturn, while seated, through an F/3
The 20" FX telescope and me, ready for an evening of observing.
In conclusion, I'm proud
to own this F/3 telescope and let people look through it. Keep in mind,
I'm a picky guy, and I don't want to show just anything. But this, I am
proud of. I suspect coma correctors will catch up me and my optics
fairly soon, so I don't have any qualms at all about making visual
telescopes as fast as F/3.
Also, even in the
tropical environment of the keys, the thin (1.25") 20" mirror proved
its worth, cooling quickly after a day of baking in the Florida sun,
albeit under a reflective cover. Fast-cooling mirrors are the future, I
believe, yielding better performance, lighter weight, and more quality
- Mike Lockwood, Lockwood Custom Optics