Orion LHD - Reviews?
- 40Eridani
- Earth Ambassador
- Articles: 0
- Posts: 1
- Joined: Thu Mar 12, 2020 2:45 am
- 4
- Location: Colorado, USA
- Status:
Offline
Orion LHD - Reviews?
Has anyone compared these to similar focal length Naglars/ES82s ?
David
Orion XT10g
Ethos (of course)
Live in a brown zone (Bortle 5) but have access to a blue zone (Bortle 3)
Orion XT10g
Ethos (of course)
Live in a brown zone (Bortle 5) but have access to a blue zone (Bortle 3)
- bladekeeper
- Inter-Galactic Ambassador
- Articles: 0
- Posts: 3603
- Joined: Thu Apr 25, 2019 2:39 am
- 4
- Location: Lowell, Arkansas, US
- Status:
Offline
-
TSS Awards Badges
TSS Photo of the Day
Re: Orion LHD - Reviews?
Hi David,
The Orion LHD are certainly attractive-looking eyepieces. I haven't read many reviews on these from forum members that I recall.
Anyway, this post should hopefully give your thread a little bump.
The Orion LHD are certainly attractive-looking eyepieces. I haven't read many reviews on these from forum members that I recall.
Anyway, this post should hopefully give your thread a little bump.
Bryan
Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100
Scopes: Apertura AD12 f/5; Celestron C6-R f/8; ES AR127 f/6.4; Stellarvue SV102T f/7; iOptron MC90 f/13.3; Orion ST80A f/5; ES ED80 f/6; Celestron Premium 80 f/11.4; Celestron C80 f/11.4; Unitron Model 142 f/16; Meade NG60 f/10
Mounts: Celestron AVX; Bresser EXOS-2; ES Twilight I; ES Twilight II; iOptron Cube-G; AZ3/wood tripod; Vixen Polaris
Binoculars: Pentax PCF WP II 10×50, Bresser Corvette 10×50, Bresser Hunter 16×50 and 8×40, Garrett Gemini 12×60 LW, Gordon 10×50, Apogee 20×100
- Ruud
- Orion Spur Ambassador
- Articles: 0
- Posts: 813
- Joined: Sun Feb 09, 2020 9:56 pm
- 4
- Location: the Netherlands
- Status:
Offline
Re: Orion LHD - Reviews?
The LHD are Long Perng eyepieces. See here:
http://www.longperng.com.tw/goods.php?act=view&no=196
Not much information there. That's a pity: the field stops would give an indication of the true fields of the eyepieces, and how much pincushion distortion they have.
The "clear apertures" of around 30 mm that Long Perng list are not the field stops of the eyepieces! For 80° eyepieces with zero excess pincushion, the field stops should be:
focal length Ideal field stop
4mm 5.59 mm
6mm 8.38 mm
9mm 12.57 mm
14mm 19.55 mm
20mm 27.93 mm
If the real-life, measured field stops are 5% smaller than these ideal values, as is the case for many eyepiece designs, then the 80°afov of the LHD is a by pincushion distortion inflated 76° afov , showing the same true field of an ideal 76° eyepiece would, with extra pincushion distortion added.
The field stop diameters of Morpheus eyepieces are close to ideal and although they have a 76° view, they might well show the same true field as equivalent LHD 80° eyepieces.
The Morpheus have larger eye lenses too and the Morpheus are very, very nice for a better price (at least over here).
By the way, having larger eye lenses combined with a smallerafov , the eye relief of the Morpheus must be greater than that of the LHDs.
Knowing how good the Morpheus are (I have the 4.5, 6.5 and 17.5 mm and they are Delos quality) I'd say go for them and save some money.
Mind though that the Morpheus 14 mm is reported to be weak at the edge of the field, so I can't recommend that particular one.
http://www.longperng.com.tw/goods.php?act=view&no=196
Not much information there. That's a pity: the field stops would give an indication of the true fields of the eyepieces, and how much pincushion distortion they have.
The "clear apertures" of around 30 mm that Long Perng list are not the field stops of the eyepieces! For 80° eyepieces with zero excess pincushion, the field stops should be:
focal length Ideal field stop
4mm 5.59 mm
6mm 8.38 mm
9mm 12.57 mm
14mm 19.55 mm
20mm 27.93 mm
If the real-life, measured field stops are 5% smaller than these ideal values, as is the case for many eyepiece designs, then the 80°
The field stop diameters of Morpheus eyepieces are close to ideal and although they have a 76° view, they might well show the same true field as equivalent LHD 80° eyepieces.
The Morpheus have larger eye lenses too and the Morpheus are very, very nice for a better price (at least over here).
By the way, having larger eye lenses combined with a smaller
Knowing how good the Morpheus are (I have the 4.5, 6.5 and 17.5 mm and they are Delos quality) I'd say go for them and save some money.
Mind though that the Morpheus 14 mm is reported to be weak at the edge of the field, so I can't recommend that particular one.
7x50 Helios Apollo ✶ 8x42 Bresser Everest ✶ 73mm f/5.9 WO APO ✶ 4" f/5 TeleVue Genesis ✶ 6" f/10 Celestron 6SE ✶ 0.63x reducer ✶ 1.8, 2, 2.5 and 3x Barlows ✶ eyepieces from 4.5 to 34mm
- Lady Fraktor
- Universal Ambassador
- Articles: 0
- Posts: 9958
- Joined: Mon Apr 29, 2019 9:14 pm
- 4
- Location: Slovakia
- Status:
Offline
Re: Orion LHD - Reviews?
Long Perng typically makes good eyepieces but the eye lens of these is to small to produce a 80° AFOV so either they are not 80° or they do not have 20mm eye relief.
One of those two is wrong.
One of those two is wrong.
Gabrielle
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
Create an account or sign in to join the discussion
You need to be a member in order to post a reply
Create an account
Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute