80mm ed triplet

[hatflyer]

Are any of these triplets any good for astrophotography?

saxon 80mm Apochromatic Air-Spaced ED Triplet ; 480mm f/6 (FCD100 glass)

Meade Series 6000 80mm f/6 ED Triplet APO - (FPL53 glass)

Thanks.

[chris_g]

Is this scope any good for astrophotography?

Thanks.

Which one? Triplets tend do give extremely good results...

[hatflyer]

Is this scope any good for astrophotography?

Thanks.

Which one? Triplets tend do give extremely good results...

Oops, forgot to put which models. I updated the OP.

[JayTee]

I have the ES Essential 80mm triplet APO. And the Celestron AVX EQ mount. Here's an example of what the two can do. This is the Eta Carina nebula.

[hatflyer]

I have the ES Essential 80mm triplet APO. And the Celestron AVX EQ mount. Here's an example of what the two can do. This is the Eta Carina nebula.

Nice. What Bortle zone?

So u don't think the HOYA FCD1 ED glass decreases image quality?

[JayTee]

B 4-5

So u don't think the HOYA FCD1 ED glass decreases image quality?

It is the only triplet (APO) I own so I have no comparison scope to judge it against. But it is by far my best, insofar as, image quality compared to all my other Achromats.

[Bigzmey]

I have the ES Essential 80mm triplet APO. And the Celestron AVX EQ mount. Here's an example of what the two can do. This is the Eta Carina nebula.

Nice. What Bortle zone?

So u don't think the HOYA FCD1 ED glass decreases image quality?

It is not the type of ED glass, it is how well the triplet or doublet designed around particular glass type.

[Juno16]

I have the ES Essential 80mm triplet APO. And the Celestron AVX EQ mount. Here's an example of what the two can do. This is the Eta Carina nebula.

Nice. What Bortle zone?

So u don't think the HOYA FCD1 ED glass decreases image quality?

JT will respond with his thoughts, but I image with an Explore Scientific ED102 FDC1 and find the quality to be better than my current abilities.
You can get better glass for more $$, but I will probably never reach a level where I will need that. Just my thoughts.

[JayTee]

I image with an Explore Scientific ED102 FDC1 and find the quality to be better than my current abilities.
You can get better glass for more $$, but I will probably never reach a level where I will need that. Just my thoughts.

I'm in total agreement, Jim.

[Lady Fraktor]

The Saxon refractor is a Explore Scientific 80mm so cheaper to buy it in USA than have it shipped from Australia.
As far as I know the Meade series 6000 have been discontinued for a while now so would have to find a used one.

The only major advantage of a triplet over a doublet is the triplet will let you image deeper into the UV and IR but most quality doublets will do just fine.

[hatflyer]

The Saxon refractor is a Explore Scientific 80mm so cheaper to buy it in USA than have it shipped from Australia.
As far as I know the Meade series 6000 have been discontinued for a while now so would have to find a used one.

The only major advantage of a triplet over a doublet is the triplet will let you image deeper into the UV and IR but most quality doublets will do just fine.

I thought triplets were a sizable upgrade from doublets. I know in general there's a bump up in focal length on average (420 to 480) and aperture (70 to 80).

So an Astro-Tech AT72EDII with FPL53 glass is not a big drop-off from the triplets above? It would save weight and $, but I want to strive to get the highest quality from these wide-field scopes. But if the differences are minimal, I would go for a doublet.

When would UV and IR be a factor in imaging?

Thanks.

[Lady Fraktor]

With the colour correction of most quality telescopes today there is not much difference between doublets and triplets.
The triplet can image a bit deeper in UV and IR as I stated though you likely will not see a major difference n your images.

Honestly you do not need to be concerned about the ED glass type in the refractor, the important glass is what is mated with it.
Have you ever wondered why they tell you the ED but not the other glass?

If the refractor is a quality brand (Astro Tech is good) the glass will be good, I would be more attentive to what focuser and accessories come with it.

I thought triplets were a sizable upgrade from doublets
There was a large difference years ago but with the glass and coatings available today there is only a small difference.
Takahashi make doublets and you will not hear anyone complain about those

[hatflyer]

With the colour correction of most quality telescopes today there is not much difference between doublets and triplets.
The triplet can image a bit deeper in UV and IR as I stated though you likely will not see a major difference n your images.

Honestly you do not need to be concerned about the ED glass type in the refractor, the important glass is what is mated with it.
Have you ever wondered why they tell you the ED but not the other glass?

If the refractor is a quality brand (Astro Tech is good) the glass will be good, I would be more attentive to what focuser and accessories come with it.

I thought triplets were a sizable upgrade from doublets
There was a large difference years ago but with the glass and coatings available today there is only a small difference.
Takahashi make doublets and you will not hear anyone complain about those

As for focusers, I guess not all dual-speed ones are equivalent? What should I look for?

Do u know anything about the TS Optics Apochromatic refractor AP 80/560 ED OTA? There are 2 versions (Photoline, more expensive). Not sure the difference. Anyway, there is a flat corrector (TSFLAT2), so flat images at 560mm sounds enticing. Well, on paper. It is only an f/7, but with a tracker, does that matter much? I'm trying to get quality with as much reach as possible, and not break the bank. I guess everyone is.

[Lady Fraktor]

If the scope will be used for a bit of both visual and AP a crayford will usually work quite well.
If intended for just AP/ heavy camera load a rack & pinion may be preferable.

TS Photoline refractors are very nice, their in house brand of quality refractors. I recommend them quite often.
f/7 is a good mid range focal ratio, with a reducer you can get some very widefield images, use a barlow and your set for imaging planets or the Moon.

[hatflyer]

If the scope will be used for a bit of both visual and AP a crayford will usually work quite well.
If intended for just AP/ heavy camera load a rack & pinion may be preferable.

TS Photoline refractors are very nice, their in house brand of quality refractors. I recommend them quite often.
f/7 is a good mid range focal ratio, with a reducer you can get some very widefield images, use a barlow and your set for imaging planets or the Moon.

Last one. I think.

Will there be much difference between these 2 Photoline scopes (besides price)? This is for AP, galaxies and nebula and planets.

- 80 mm triplet f/6; fl=480mm

- 80 mm doublet f/7; fl-560mm

And can they both perform with the available 1:1 corrector, thus maintaining the focal length?

Thanks.

[Lady Fraktor]

It would help if you could post links to the specific refractors.
Under TS Photoline I only see two 80mm f/6 shown.
The difference between those two refractors is the more expensive one comes with a 2" Starlight Instruments reverse crayford (very, very nice) and the other uses a 2.5" R&P

Can you post a link to the 80mm f/7?

[hatflyer]

It would help if you could post links to the specific refractors.
Under TS Photoline I only see two 80mm f/6 shown.
The difference between those two refractors is the more expensive one comes with a 2" Starlight Instruments reverse crayford (very, very nice) and the other uses a 2.5" R&P

Can you post a link to the 80mm f/7?

Found on 2 sites:

https://www.teleskop-express.de/shop/pr ... ctive.html

https://www.astroshop.eu/telescopes/ts- ... ifications

[hatflyer]

Just saw this 1 for saler - Sky-Watcher EvoStar 80mm f/7.5 Doublet APO Refractor ED80; focal length is 600mm, and FPL53. Thoughts?

[Lady Fraktor]

I thought it was a Photoline triplet. oops!
A good refractor, 2.5" R&P focuser.
Either refractor would work well for you.
If you can afford the triplet get it but if the doublet is easier on the banking account you will not be disappointed.

As to the corrector, the AP voodoo practitioners will have to comment on its worth.

[Lady Fraktor]

Just saw this 1 for saler - Sky-Watcher EvoStar 80mm f/7.5 Doublet APO Refractor ED80; focal length is 600mm, and FPL53. Thoughts?

I love Skywatcher marketing blurbs, always good for a laugh!
Personally I would go with the Photoline though I am sure the Skywatcher would be a good refractor.