MrGuGuZai

Hi, i just bought a skywatcher mak 127, when arrived i only realise i bought the OTA without mount. so i ordered az gti mount, because of covid 19 lockdown in my country they can only deliver after the lockdown period.

my question is can i use mak 127 on a camera tripod temporarily? i had this https://www.samurai-...samurai-pro-888. it show can support 5kg max.

Skywatcher skymax 90mm mak or Skywatcher evostar 90mm.

which one is better for planetary?

Hi,currently owned 70mm refractor, want to upgrade and many suggested me to get 6" dobsonian.

The only 6" dob i can find in my country is GSO 150mm/1200mm dob (https://www.opticaluniversescientificinstrument.com/products/gso-6-dobsonian-telescope), is this brand and specs ok?

My main targets is planet and moon, maybe some star, i wonder is it hard to imaging planets? ill be using ccd eyepiece connected to laptop. 

I live in malaysia city area, very less likely i will bring the scope to darker area because its pretty far from my home,and the scope quite big, so its dobsonian suitable for minor light population? 

I heard that that dobsonian can affected by weather and cooling the scope be a big issue? 

hope expert can give some advice. thanks
 

1 minute ago, Cornelius Varley said:

The 20mm eyepiece has a built in erecting prism to give you an upright image, the black lines are probably the edge of the prism.

yup, cheap eyepiece. 

Nevermind i found the problem. 

Why there's black line around in my view 20mm eyepiece?

Celestron ExploraScope 70AZ 

4 hours ago, Nerf_Caching said:

Well, that is a slightly more complex question to answer. For starters, magnification = focal length of telescope / focal length of eyepiece. So yes, the magnification for the 90mm will be higher than the 130 for a given focal length of eyepiece. For instance, a 32mm eyepiece will provide more magnification in the 90mm refractor than the 130p, because the 90mm has a longer focal length. However, keep in mind that magnification is not necessarily indicative of the power of the telescope. In fact, there are three indicators of the 'power' of a telescope, namely aperture, resolution and magnification. Arguably the least important of the three of them is magnification. Magnification is nothing without good aperture and therefore resolution as all magnifying does is dim the view and blur it if you push the magnification too high. Hence, I highly suggest you to buy the most aperture you can afford; the 130p is a good starting point as I have said.

By the way, an eq mount would be a pain to use for visual astronomy anyway if you are a beginner. Alt-az mounts such as on the 130p are easier to find objects with. Ideally, eq mounts would be used for astrophotography (and not a flimsy eq2 mind you).

i tend to do some imaging, is the dobsonian mount hard to do imaging? 

5 hours ago, Stu said:

The 90mm has a 900mm focal length. Yes you could reach the same magnifications, you just need shorter focal length eyepieces.

The 90mm on the EQ2 Mount would be fiddly and not so stable, if you did opt for this then an alt az Mount would be better.

How portable do you need the scope to be, would you need to carry or transport it anywhere? A 102mm or 127mm Mak may be a good option for you, something like this.

https://www.firstlightoptics.com/sky-watcher-az-pronto/sky-watcher-skymax-102-az-pronto.html
 

Maks are great on the Moon and Planets and good for small star clusters too.

thats mean i just need to just shorter focal length eyepiece for 130p  to achieve same magnification of 90mm? 

7 minutes ago, Stu said:

John, that is a completely different proposition from a budget and size perspective so not really helpful to the OP.

@MrGuGuZai I would tend to agree with @Nerf_Cachingthat the Heritage 130p is a great little scope for the money, and is very compact and easy to use. Great optics too given the price, I have split tight double stars with mine down to 1.4”, quite impressive for something that cost me £50 secondhand!

What sort of budget do you have and where would you observe from?

budget is around 300, ill only use the telescope in city. im from Singapore 

6 hours ago, Nerf_Caching said:

If I were you I would choose the 130p over the 90mm for a number of reasons. Firstly, the 130p will not only provide you with good views of the planets, it will also show you a variety of deep sky objects due to its larger aperture than the 90mm refractor. Additionally, while the 90mm refractor excels for planet viewing, that would be the end of its advantages. The 130p may require an Barlow lens(which I think is included) to get to the higher magnifications, although you can still see Jupiter and Saturn clearly even without it. Above all, the 130p is extremely portable,  more so than the 90mm which means you can easily transport it to a dark-sky site if and when needed. Hope this helps!

is the 130p can provide higher magnification than the 90mm? the 130p has 650mm focal length while 90mm has 900mm focal length. 

Hi, want to get a new telescope, SkyWatcher Evostar 90 EQ2 or SkyWatcher heritage 130p? i saw many suggested refractor is good for planets, i mostly target planets, moon and some star only, live in city.  need some advice. thanks. 

6 hours ago, Philip R said:

As long as the eyepiece (4mm) and x3 barlow are 1.25" then "yes it will" - but it will be too much magnification with the 4mm e/p' & barlow combined. With the 10mm & barlow combined; it maybe doable. The higher the magnification, you start loose contrast and the finer details of the object you are viewing when focussed, which you is what you do not need. Aperture of the 'scope is king; not the focal length of the eyepiece.  As a guide, 50x per inch/25mm of aperture of the 'scope is normally the sweet-spot.

Not sure about the camera though... sorry! - most budget astro-cameras are equal to what you will see when viewing through the 'scope with your eyes and a 6mm e/p.

 

Stay safe! 😷

i quite worry, because my frend uses a EP from other telescope and the focuser could not focus the object. 

1 hour ago, Cornelius Varley said:

The term "magnification" doesn't apply to imaging. You can find the field of view of the telescope/camera combination by using this field of view calculator. You will need to find out the dimensions of the sensor and pixel size for your camera because it isn't listed.

The specifications from Amazon

Specification
Sensor:1/3" CMOS OV2710
Pixel size:3μm
Resolution:2 mega pixels 1920x1080

 

i just contact the manufacturer, they told me this eyepiece camera is equivalent to 4mm EP

Hi, my current telescope is Celestron ExploraScope 70AZ, thinking upgrade to skywatcher heritage 130P(came with 25mm ajd 10mm EP) ,  if i do, can i use the eyepiece (4mm) and x3 barlow from my old celestron on the 130P?

One more question, i ordered a eyepiece camera Svbony SV105, i wonder what is magnification of this camera and how it work to change magnification. 

Hi, i have a Celestron ExploraScope 70AZ,  when i look at the saturn or jupiter (low or high magnification) the picture is clear if the object is at middle of my viewing but blurry and color mismatch if the object is at left side of the viewing.