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80mm ED f/10 FPL-53 & Lanthanum

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122 replies to this topic

#101 Gregory Gross

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Posted 19 May 2020 - 01:30 PM

Other than a 80mm will be lighter and more portable than the 100mm.


This is precisely why I would be drawn to an 80mm f/10 scope over a 100mm f/9 scope given my preference for using a lighter mount for greater convenience. But if this is my criteria, my use of this Long Perng scope and the SW 100 as examples may be flawed. To my knowledge, the Long Perng weighs in anywhere from 4.1 kg / 9 lbs (see this post) to 4.6 kg / 10 lbs (see this post) while the SW 100 weighs in at around 3.6 kg / 8 lbs (see this post).

 

The greater wrenching force that a longer tube would exert on a mount is also something to take into account, of course.



#102 Jond105

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Posted 19 May 2020 - 02:30 PM

The 80mm f/10 has better optics and will give a sharper more contrasty image than the 100mm. Probably not a lot in it but think the superior optics of the 80mm would let you pick out finer detail. 

Love the build quality of the 80mm Just as good as William Optics.

 

Basically it’s just a newer generation of scope vs one that has been around for a while. What will Skywatcher do to up their game? 

Just add a piece of lanthanum? And have the same optics?



#103 johninderby-uk

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Posted 19 May 2020 - 02:45 PM

The optics are simply better than the SW doublets. It’s not just the added lanthanum element but the overall quality of the optics is better. And the quality control of the scope  is excellent as well. 



#104 Jond105

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Posted 19 May 2020 - 02:53 PM

The optics are simply better than the SW doublets. It’s not just the added lanthanum element but the overall quality of the optics is better. And the quality control of the scope  is excellent as well. 

Where are you getting that from. So a FPL-53 lanthanum in an 80 is better so much than a 100 with already fpl-53 and adding a lanthanum? How many 100ED’s have you owned now. Cause I’ve yet to own one with bad quality control ever. But if you know something I don’t, I’m all ears. 



#105 johninderby-uk

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Posted 19 May 2020 - 02:57 PM

You’re not getting it. The ED100 is a good scope but the new scope is simply a better quality product in all areas. Sorry but that’s just the way it is. 



#106 Jond105

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Posted 19 May 2020 - 03:01 PM

You’re not getting it. The ED100 is a good scope but the new scope is simply a better quality product in all areas. Sorry but that’s just the way it is. 

Im sitting here wondering how though. Based on what. Just the lanthanum glass?  Mechanics, sure, but optically, besides lanthanum, the two are on the same levels with the FPL-53. I’m in no way knocking the 80, I’m just wondering how optically the 80 is far superior and where that’s been proven. That the SW FPL is much lower in quality to the 80 FPL?



#107 SeattleScott

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Posted 19 May 2020 - 03:32 PM

Yeah, generally a premium brand will have higher grade FPL53 glass and a more precise, more polished figure. But is the LP 80mm a premium brand? Idk. My 100ED, while having a bit of SA, was essentially color free for visual use, so I wouldn’t really make a big deal about the La. The La element seems more appropriate to give a 4” F7 or 4” F7.7 similar CA correction as the SW 100 at F9. I suppose those who are really sensitive to CA would appreciate the 80mm F10 with La though.

Scott

#108 25585

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Posted 19 May 2020 - 03:33 PM

My 100 Equinox has a full CNC Long Perng tube, sliding dew shield, nice CNC rings & a good focuser. Its optically not Tak fluorite good, compared to my FC100DL though which is also F9.

 

The 80mm F10 StellaMira is 20mm aperture less. Optically, It would beat my TV-85 perhaps & 80 Equinox definitely, but not the 100 Equinox, though, which has excellent optics for price.  However I think your SM is the 80 Equinox that should have been, but the one that was, a F6.5, was aimed at imagers, sort of proto-Evolux.

 

Interesting S-W have avoided an 80mm Evoluxe, maybe leaving their FPL-53 80 well enough alone. 



#109 eros312

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Posted 20 May 2020 - 06:16 PM

Got a new toy today.

StellaMira1.jpg

StellaMira2.jpg


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#110 25585

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Posted 21 May 2020 - 06:10 AM

Got a new toy today.

attachicon.gifStellaMira1.jpg

attachicon.gifStellaMira2.jpg

I prefer your black rings. What size do you use?



#111 LunarObserver

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Posted 21 May 2020 - 08:46 AM

Where did you purchase it from?  Thanks 



#112 eros312

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Posted 21 May 2020 - 12:56 PM

I prefer your black rings. What size do you use?

Those came with the scope. Don't know what size they are. 



#113 eros312

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Posted 21 May 2020 - 12:57 PM

Where did you purchase it from?  Thanks 

First Light Optics. 



#114 Gregory Gross

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Posted 21 May 2020 - 01:59 PM

Got a new toy today.

Since I've been on the lookout for a compact long-focus refractor with premium optics that will ride comfortably on a lightweight equatorial mount, I've been following this thread closely. I'm interested to hear your thoughts about this scope as you settle in with it!


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#115 LunarObserver

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Posted 21 May 2020 - 08:43 PM

May I ask how much shipping this from the UK is?  I have also been following this thread.  I would be interested in your reports of this scope.

Thanks,

David



#116 eros312

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Posted 21 May 2020 - 09:14 PM

May I ask how much shipping this from the UK is?  I have also been following this thread.  I would be interested in your reports of this scope.

Thanks,

David

£48.29=$59



#117 Kevin Barker

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Posted 21 May 2020 - 09:17 PM

DSCF0012.jpg
DSCF0010.jpg

 

Do not underestimate the f-10 80 mm. This scope I made about 16 years back has proven to be a great wee performer. 

I think one of the advantages of have a longer focal length is that you can use a longer focal length eyepiece without 6+ elements of glass and get a decent magnification without barlowing. I often use a 6 mm eyepiece with my 80 mm f-10.5 for Jupiter etc.

 

 

This lens an 80 mm f-10.5 achromat with short flint glass delivers very crisp planetary images. 


Edited by Kevin Barker, 21 May 2020 - 09:26 PM.

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#118 eros312

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Posted 21 May 2020 - 09:22 PM

All together including shipping my card was charged $1013.86. And I got a text from DHL that I owed duty, with a link to pay online. Which was $89.28. Not bad. I ordered early Monday and received it Wednesday afternoon. Faster than any shipping I get in the States. I've ordered a lot from FLO and they are an excellent merchant. Highly recommended. 


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#119 AstroRed

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Posted 22 May 2020 - 03:22 AM

Im sitting here wondering how though. Based on what. Just the lanthanum glass?  Mechanics, sure, but optically, besides lanthanum, the two are on the same levels with the FPL-53. I’m in no way knocking the 80, I’m just wondering how optically the 80 is far superior and where that’s been proven. That the SW FPL is much lower in quality to the 80 FPL?

 

Yep, until we have a few objective side by side comparisons we're still in the familiar territory of "astronomer buys shiny new refractor and really likes it" type reviews that I've never found to be that reliable 


Edited by AstroRed, 22 May 2020 - 03:22 AM.


#120 25585

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Posted 22 May 2020 - 04:04 AM

 

 
 

 

Do not underestimate the f-10 80 mm. This scope I made about 16 years back has proven to be a great wee performer. 

I think one of the advantages of have a longer focal length is that you can use a longer focal length eyepiece without 6+ elements of glass and get a decent magnification without barlowing. I often use a 6 mm eyepiece with my 80 mm f-10.5 for Jupiter etc.

 

 

This lens an 80 mm f-10.5 achromat with short flint glass delivers very crisp planetary images. 

 

And also longer FL eyepieces have better eye relief. Less expensive eyepieces also work OK.  


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#121 eros312

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Posted 01 June 2020 - 12:14 AM

I spent about an hour with my new scope and the Moon tonight. Only took out 3 eyepieces, a 19mm Panoptic, 5mm SLV, and a 2.5mm Olivon HD. I also used a baader zeiss spec prism. Seeing was excellent. At 320x the image was still sharp with no breakdown, focus easy to find. I'm impressed. Definitely above average optics. I love the focuser, when you rotate it the finder rotates too. It's a porker though, probably close to 10 pounds. I used it on my Vixen Advanced Polaris mount and vibrations died out in less than 2 seconds. It's nice to see a scope like this come to market. 


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#122 RichA

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Posted 02 June 2020 - 01:48 AM

The optics are simply better than the SW doublets. It’s not just the added lanthanum element but the overall quality of the optics is better. And the quality control of the scope  is excellent as well. 

Definitely not hard to believe.  But on the flipside, if there was a demand for long refractors, we'd see more.  Everything today is geared toward imaging.



#123 RichA

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Posted 02 June 2020 - 01:51 AM

All together including shipping my card was charged $1013.86. And I got a text from DHL that I owed duty, with a link to pay online. Which was $89.28. Not bad. I ordered early Monday and received it Wednesday afternoon. Faster than any shipping I get in the States. I've ordered a lot from FLO and they are an excellent merchant. Highly recommended. 

After conversion, the Canadian source would have been about $889 plus $50 shipping or so.  No duty.  Possibly taxes, depends on your state.




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