腳架問題

[sharkfin]

80/480 refractor with eyepiece 4kg + manfrotto 410, 1.3kg = 5.3kg

用 Gitzo 1541 tripod (load 8kg)

好似有啲震, especial adjusting focuser

is it normal????

or should i buy Gitzo ser.2 (load 12kg) or ser 3. (load 18kg)???

and should i buy benzo for save $?

[TONGKW]

A Series “1” tripod is a bit weak for supporting 80 mm refractor OTA. At least you need a Series “2” tripod with the top leg having a diameter of 28 mm.
Tripods of Gitzo, Manfrotto, Benro, Sirui, or Velbon etc. will all do the job.

[sharkfin]

如果32mm 開三節 會不會 = 28mm開二節 = 25mm只用一節,
因它們最底果節都是25mm

[sharkfin]

what is the connection between the 80mm and the manfrotto 410 in the picture

[TONGKW]

Nowadays many tripod manufacturers (such as Gitzo, Benro, Sirui) have graded their tripods by the diameter of the top leg, at least approximately. Thus, Series “1” = 24 mm, Series “2” = 28 mm, Series “3” = 32 mm Series “4” = 36 mm, Series “5” = 40 mm, etc.
Generally a 3-section tripod would be more rigid and can support a larger load than a 4- section tripod or 5-section tripod of the same Series but would be longer in length.
The mounting foot of my William Optics 80 FD refractor OTA has two 1/4” BSW screw holes and so the mounting plate of the Manfrotto 410 gear head can just screw on.

[sharkfin]

thanks a lot
what's the tripot you are using in the photo, and can you share experience with it, any shake in high magnication?

[TONGKW]

As I have already mentioned, this William Optics ZS 80 FD refractor OTA (about 6 lb) is on a Manfrotto 410 gear head and a Velbon 640 CF tripod. For visual observation the set up is very transportable and quite stable at over 150x. Of course the use of a still larger tripod, such as a Sirui 3004 tripod that I also have, would be more stable. But that would add some more weight and so there is always a compromise.

[MANDII]

why don't buy a mount instead of tripod ?
Many mount nowadays only cost around HKD 1000 ,which can support your 5KG .

[sharkfin]

Thanks mandii suggestion,
may you suggestion some mount for me, which is reasonable light weight and portable, can be short leg

[sharkfin]

and I am thinking of sirui 3004 vs 3204,
which is metal alloy vs carbon fiber

which material is better?

[MANDII]

well , I see .. . When you are talking about you need to bring it outdoor , surely these mounts are quite heavy . My one is equitorial mount EQ3 , market price cost about HKD1200 without motor . I got it from a second hand price dealing 400HKD with motor . And it's not difficult for one to find many types of mount on china web site with such range of price nowadays . However , you might feel too heavy comparing with your current tripod .