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"look" of the equipment. (The assembly instructions are not as clear as they could be.) Since it was cloudy,

only "indoor tests and inspections" could be made the first night. (Isn't it always cloudy when you get a new

scope?) The unit I received is Serial Number 563. This may indicate why information on the product is so

sketchy - there just aren't many out there yet.

Several sample defects were found during the assembly process. The first, while not a defect per se, could

still be considered a minor quality control problem. I was given an extra leg locking "hand wheel" screw in the

tripod kit. While not a problem for me, I wondered if someone else out there is going to be short one. (I

suppose it's possible that an extra was included as a spare, but the instructions and parts diagrams don't

mention it.)

The second sample defect was much more serious and made my heart sink when I ran into it. Once the

scope was fully assembled, I connected all the cables, loaded the batteries, and turned the unit on. It went

through its diagnostic tests, flashing the LEDs on the control pad in sequence as expected and then started

slewing in R.A. at 32x speed. The control pad could not stop the forward motion. I turned the unit off and

back on several times with the same result. I began to think of having to repack everything for return

repair/exchange. I unplugged all the cables, checked the battery insertion and carefully reconnected the

cables. This time, nothing functioned when I turned power on. Thinking the internal fuse in the control panel

might have blown, I followed the manual to check it out. Upon opening the unit, I found the cause. The fuse

was good but one of the internal cables from the control board to the R.A. motor was pinched by having been

compressed between an electronic component (DIP) pin and the mounting plate tang to which the control

cover is screwed. The insulation was clearly pricked by the pin. I was able to reroute the cable wires and

reassemble the control panel. Now when powered on, the unit functioned flawlessly. I consider this problem

serious since the average user would probably not have been able to isolate or correct it. In all fairness, it is

likely that the unit was properly inspected and did work before it left the factory since shipping shock and

vibration could have caused the pinched wire's insulation to puncture in transit. Nevertheless, I believe the

cable routing and DIP pin proximity to the metal mounting flange represent a possible design flaw that could

cause others the same or similar problems.

A third sample defect was discovered in the 25mm MA eyepiece supplied with the scope. The bottom field

lens retaining ring in the eyepiece was not completely screwed into position. This resulted in the field lens

being loose and rattling when the assembly is handled. The eyepiece worked as well as an MA can after

securing the ring. This was not a big concern to me as the eyepiece immediately went into "mothballs" with my

Kelners, and older Orthoscopics. This defect would cause more problems for a first time buyer without a

collection of other eyepieces to draw from.

In looking at the overall design of the scope, there are several things I like a lot. The low power operation

from internal batteries is a big plus over my LX-3's external motorcycle battery, especially for short sessions in

the back yard. This additional ease of set-up was one of the features that made the newer scope appealing to

me. I also like the latitude fine adjustment mechanism on the new wedge much better than that supplied back

in 1987. The new one is actually usable. The final feature I really like is the ventilation fan in the tube

assembly of the 7" Mak. I have heard that it was added primarily because of the added thermal mass of the

thick corrector plate. It's intended to help bring the scope more rapidly into thermal equilibrium (I guess).

After using it, I now want one retrofitted onto my 10". (The 10" seems to take a very long time to stabilize,

detracting from the usability of the instrument for short observing sessions.) The instruction manual does not

explain the fan's proper use (more on that later) but I found that it was remarkably quick at eliminating tube

currents seen in the star tests. (More on the star tests below.)

Just as there are things I like about the design and feature package of the LX-50 7" Mak, there are some

things that could be improved. The most annoying item I ran into was the user's manual. Hopefully, it is being

rewritten for the 7" Mak, but the version I got was basically the 8"/10" SCT LX-50 manual with a few

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