Chris Roche gave an excellent talk called Why is the Sun hot at the North Lincs astro society at Barton Upon Humber, Far ings nature reserve for the March 2018 meeting. As always Chris gives a very informative talk with a little humour mixed in.
Around 25 members + guests arrived and had a thoroughly enjoyable evening. Thank you as always the Glennys and Malcolm for the refreshments and the Lincolnshire wild life trust for the use of the venue. Northern Optics was in attendance with some bargains on the night.
A customer came to the Northern Optics weekend outlet at the Waters` Edge visitor centre at Barton Upon Humber looking for a premium spotting scope for viewing coastal wildlife. Without hesitation they chose our Celestron Regal M2 80mm twin eyepiece set. The twin eyepiece set comes with a 27x fixed eyepiece. This is perfect for low light conditions, plus has stunning edge of field sharpness.
For more general use the Regal M2 20-60x eyepiece gives a sensible range of powers, with the bonus of accepting a DSLR camera body with a t-ring (not included).
The ED glass from the Regal M2 range give excellent colours and contrast with minimal chromatic aberration. Handling is excellent with a dual speed focus mechanism. Nitrogen waterproof for use in all conditions, with the back up of a stay on case to keep the elements out.
We often find at the Northern Optics weekend display , given the choice of 8x and 10x with the same make and model of binocular, most people go for the 8x. This this exactly what one of our customers did at the Waters` edge visitor centre at Barton Upon Humber.
After looking through some 10x, the 8x version gave a wider, brighter view with closer focus. But do not let this put you off. When looking at more distant targets, or planes and ships at sea, the extra 2x gives you the close up detail you require.
Another advantage of lower magnification is they are easier to hold steady and give a slightly larger depth of field.
Everyone is different, and has different subjects to look at. So if possible always go to an outlet where you can try different binoculars.
The Celestron Cypress binoculars were the Optics of choice when a customer came to the Waters` Edge visitor centre Northern Optics weekend display at Barton Upon Humber.
Other sets tried in the similar price range were compact 8×25 , 8×26 and 10×26 roof prism designs. But the porro prism 10×25 Celestron Cypress binoculars, from the customers point of view gave an instantly brighter image.
I find compared to the usual roof prism compacts, the porro prisms like for like in optical quality give you the edge with the slightly larger prisms. Not everyone likes the feel of compact porro prisms. Seems to be a love , hate reaction. But if you can get to grips (excuse the pun) with the shorter, wider body, there are some excellent choices out there.
Today a customer came to the Northern Optics weekend outlet looking for a set of 8x or 10x binoculars for general use. But just to prove many people still like traditional style porro prisms designs, he was not interested in the choice of roof prisms.
The customer liked the way porro prism binoculars handle, and the wide field of view they can offer. After looking at a few options from 7×35 , 8×40 and 8.5×42, the set they opted for was the Ostara Elinor 8×45. It was very close, with all models impressing him. But when the choice was down to 2 sets, the Ostara Elinor 8×45 won due to handling and weight.
From my point of view the Elinor 8×45 are a great all round choice for general use, bird watching and astronomy. The 45mm lens matches many 50mm porro prism optics from other brands in a more compact body. Extremely well built, yet easy to handle. The large exit pupil makes them usable in most lighting situations.
The new Skywatcher Evoguide ED 50 guidescope offers remarkable performance at a very attractive price point.
Features the renowned Ohara S-FPL53 glass for the ED element for a crisp , bright view with virtually no chromatic aberration. The short focal length of only 242mm gives a very fast ratio of only f4.8 . Focus is made with a precise helical version.
A built in t-thread is included. This makes it ideal as a fast telephoto lens, as well as a guide scope. Add a 1.25″ diagonal and eyepiece (not included) for a super fast short tube refractor.
Highest practical power: x100 (Eyepieces not supplied)
Objective lens diameter: 50 mm
Telescope focal length: 242 mm (f/4.8)
Focuser: fine helical (1.25”)
Camera / Eyepiece connection: T2 thread / 1.25” socket
Optic: Doublet ED lens with 2 Ohara glass lenses (1 lens S-FPL53)
The Ostara O-III filter is a more specialised nebula filter compared to some other types. It is specifically for Planetary nebula such as M57, Dumbell and the Eskimo nebula , plus diffuse nebula such as the Swan and Veil. From my personal experience I have had my best ever view of the Eskimo nebula where it jumped out at me from the back ground sky.
Be aware, this filter is suitable for good quality telescopes over 4″. You will not be able to get the full potential using a small starter telescope. For small telescopes, the Ostara Moon / Skyglow filter will aid reduce the background glow.
Available in 1.25″ and 2″, the Ostara O-III filter comes in a sturdy foam lined case. Image shows the wavelength chart
Often overlooked by the Ostara 26,32 and 38mm 2″ SWA-70 eyepieces, the Ostara 30mm SWA 2 inch eyepiece is a hidden gem in the middle of the pack.
Featuring a very solid 420g body with 5 element fully multi-coated optics, you get a lot of eyepiece for your money. Designed to give an excellent wide field of view, making it perfect for galaxies, nebula and rich field star clusters.
Comes in 2″ barrel size only and threaded for 2″ filters. Complete with twist type bolt case.
Long eye relief for spectacle wearers (fold down eye cup). Other features include a rubber grip and good internal baffling to reduce stray light.
This high spec eyepiece is very rare, and limited stock may be available to purchase HERE from Northern Optics
Many modern day spotting scopes now come with a 1.25″ zoom eyepiece as standard. An advantage of this is that many 1.25″ telescope eyepieces can be used on these scopes.
The video below shows how to remove and attach eyepieces on such spotting scopes to ensure a secure fit and how to take care of the eyepiece. Note that when you remove and replace these eyepieces, the compression ring on the OTA is quite a tight fit, so if you need to turn the eyepiece, do so in a clockwise rotation. The reason for this is explained in the video.