North Lincs astro meeting. 7th November 2016

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Around 25 attended the North Lincs astro meeting at Far ings on November 2016. Sadly the speaker was unable to attend, but we were rescued by Chris Roche filling the gap with an excellent 30 minute talk on Exo Planets. He gave us an excellent insight into the different ways they are detected and how we are even able to have an understanding on their composition, size and even wind speed.

Before the talk a few of us braved the cold conditions to have some excellent views of the Moon through Paul Cottons 9.25″ Celestron SCT and Nigel’s 25×100 Helios binoculars. We all commented on how good the seeing conditions were

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M45 Pleiades image taken with a Celestron Travelscope-70 21035

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I took this image of M45 the Pleiades through a Celestron Travelscope-70 and a Canon EOS 1100D body. The mount was a Skywatcher HEQ5. Was not very well polar aligned, so kept exposure to 20 seconds to avoid star trailing.  Light pollution was an issue as always where I live, so an Ostara Moon / Skyglow filter helped keep the orange glow down to an acceptable level.

To get true focus, you should always use live view, and lock the focus once achieved. The RAW file was processed in DPP (Digital photo professional). This is the software you get as standard with Canon DSLRs. Using ISO 6400, noise was an issue. This was improved with noise reduction in DPP. Using the same software, the image was sharpened and the red cast removed using curves.

For astro imaging ALWAYS use raw files, not JPEG. With a RAW file you can bring out so much more detail that will be lost forever in jpeg

Given the basic spec telescope, badly aligned mount and light pollution, I am happy with the end result

The Celestron Travelscope-70 can be purchased HERE with the option of buying a t-ring as an option

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Celestron Omni XLT AZ 130 22152 overview and specs

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The new Celestron Omni XLT 130 comes as standard with an AZ mount for ease of set up and use. With an attractive blue finish there are a few changes from the lower spec astromaster 130. The finder scope is now the Celestron starpointer-pro. Not only is this better than the single dot one you get with the astromaster, it fits on a dovetail mount, meaning it will accept many other visual and RDF finderscopes.

Optically you get Celestrons premium XLT coatings on a parabolic mirror as used on Celestron`s higher end telescopes. Rather than the budget eyepieces, you get one 25mm plossl. The focuser is a dual use 1.25″ / 2″ that will accept 2″ eyepieces as well as 1.25″

The 130mm f5 should make it perfect for wide field observing. Mix this with a quality 2″ eyepiece upgrade and you should get some stunning views of nebula and rich field star clusters

SPECIFICATIONS

Optical Design Newtonian
Aperture 130mm
Focal Ratio f/5
Primary Mirror Design Parabolic
Optical Coatings Fully XLT coated glass optics
Eyepiece/Magnification 25mm Plössl (1.25”) / 26x
Finderscope StarPointer Pro red LED with dual circle reticle
Other Accessories SkyPortal app
Resolution Rayleigh: 1.07 arc seconds / Dawes Limit: 0.89 arc seconds
Light Gathering Power 345x the unaided eye
Highest Useful Magnification 307x
Lowest Useful Magnification 19x
Limiting Stellar Magnitude 13.1
Tripod Aluminum, 49” max height
Warranty 2-Years
Optical Tube Length 25″
Total Telescope Kit Weight 17.4lbs
Included Items OTA, mount/tripod (preassembled), 25mm eyepiece, StarPointer Pro finderscope, accessory tray, SkyPortal app

 

 

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illusion 20×50 monocular bundle. Customer purchase

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The illusion 20×50 monocular was the optics of choice at the Northern Optics weekend display recently. We had a partially sighted customer who due to their condition made binoculars impracticable. The reason they wanted them was to look at costal birds at a distance. Lower powered monoculars such as 7x and 8x were not up to the job.

Yet the 20x power of the illusions were just what they were looking for. Multi-coated optics gave excellent contrast , brightness and colours despite the small 2.5mm exit pupil. Another plus point was the eye relief was long enough to use with glasses on. This is where many high powered monoculars fall short.  The customer also found the focus very easy. Once they had decided on the monocular, they needed a tripod. The budget one was not tall enough, but the Visionary VT-70 was perfect, with it being high enough, sturdy yet light enough and came with a carry case

The illusion 20×50 monocular bundle comes with a case, wrist strap, mini tripod and hand grip. This particular bundle is very limited and may still be available from some stockists

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Skywatcher 6×30 erect image finderscope 20932. A review with a difference

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Rather than look at the night sky, I deceided to give the Skywatcher 6×30 erect image angled finder a test on a nice sunny day. This lovely little finder is often overlooked by its 9×50 bigger brother, but gives fantastic views.

So testing on buildings and lamp posts I found the following. 6x magnification is more than adequate for general use with a nice wide field. Eye relief is good for spectacle wearers. But the two big plus points other than the sharp view were the edge of field quality and most impressively the lack of chromatic aberration , not only in the centre, but on the edge. I have looked through dedicated high end monoculars with more false colour. With this in mind, its a shame there is a cross hair, and I was unable to work out a way of fitting to a tripod. But I,m sure I,ll find one compatible with a Skywatcher shoe soon. How much would you pay for a high quality 6×30 monocular with virtually no CA ?. £100 + ?. Yet at under £45 the Skywatcher 6×30 erect image finder is a worthy alternative providing you don`t  mind the cross hair and can find a way of mounting it

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Hawke Premier 12×25 binoculars review. HA4135

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The Hawke Premier 12×25 binoculars are perfect for mid to long distance viewing, on paper, so though I,d try a set.

This particular model was the HA4135 green model. The outer box shows a full colour image of the binoculars with some of the spec also shown. Though as we shall see later they are not close focus. The box itself is very sturdy, unlike many OEM binoculars. Opening the box you find a high quality padded soft neck strap. But this is standard practice for Hawke, who never cut corners with this. The case however is a standard but adequate soft one. No lens caps included

First impressions. Though only weighing 300g they do not feel or look flimsy. The focus wheel, dioptre and  twist eye cups all move freely. Handling is excellent and feel secure. So lets have a look though them. With an exit pupil of only 2mm these are never going to give a dazzling bright image. But when I tested on a dull day I was able to make out detail in the shadowed areas of the trees.

On closer inspection of the view I got a few nice surprises. The field is quoted as 85m @ 1000m, but seemed a very wide view through the eyepieces. Also the is virtually no false colour in the centre. Yes you do get CA on the outer 50% and the sharpness lowers, but within acceptable levels. Another surprise was the eye relief, which was long enough to use with glasses on.

These are shown as close focus. But I would say 5- 10 metres is more realistic. I found this varies from one set to another. So best go to a place where you can check first. But if you are using them for the mid – long distance viewing they are designed for , then this will not be a problem.

These may be discontinued soon, but contact Northern Optics to enquire if any are left

Summing up, if you are after a compact set of high power binoculars, these will do the job better than cheaper zooms. All the sets I have tested so far have been in perfect collimation

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Hawke Frontier 8×43 ED. 38300 Customer purchase

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A customer came to the Northern Optics outlet several years after purchasing a set of Hawke Frontier (old model) 8×42 from us. I must say they were in excellent condition after all those years, and the fact they were soaked in rain water as the customer walked in showed what confidence in the Hawke nitrogen waterproofing the customer had.
They were looking for a set with 10x magnification to bring out more detail in the birds feathers. After trying a couple of sets of 10×42 they were struggling to see a difference.
Then they were introduced to the Hawke Frontier ED 8×43. Although the magnification was the same as their old set, the clarity of the ED glass brought out so much more detail, and they had no hesitation in purchasing. This once again shows the advantages of buying locally and trying out binoculars before purchasing.

From our point of view, although a few years old, the Hawke Frontier ED 8×43 still match or beat many other binoculars in the same price range and spec

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TMB Supermonocentric 10mm eyepiece

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Regarded by many as the ultimate Planetary eyepiece, the TMB Supermoncentric 1.25″ range have stood the test of time by those who still use them today. The image shows my own 10mm version that still looks and functions like new after 25+ years.

A 3 element lens assembly with outstanding optics and fantastic internal baffling makes it my number one choice for double star splitting. This is not a wide angle view or has long eye relief, but I find it very easy to use. For double star viewing you need pin points of light with no flaring. For this , I am yet to find a modern eyepiece to match it

This is certainly not your usual Chinese mass produced eyepiece. What you do get is German engineering at its best. Remember I said I’ve had this eyepiece for around 25 years. Take a look at the image and try and find a typical mass produced eyepiece that wears that well. Very expensive to buy new, but if you can find a quality used one, go for it. You wont be disappointed

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Barton area group astronomy night. October 2016

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The North Lincs astro society were the guest visitors at the Barton area group , which is part of the Lincolnshire wildlife trust. With help from Andy Langford, Steve Berry gave an excellent talk on how to take images of the night sky with a DSLR. This included advice on camera settings, focusing, software etc. Sadly only 7 Barton area group members turned up. But this did not stop the show and Steve did a great job

Afterwards we were lucky to have some clear skies for a brief period. Northern Optics was in attendance with a 12″ Dobsonian and and a short tube Celestron Travelscope-70 for the Barton group to look though. Targets we got to see were the double cluster, Andromeda galaxy, Mizor / Alcor double star and Alberio double star

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Ostara PL 6.5mm plossl eyepiece for planetary viewing

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The Ostara PL 6.5mm eyepiece is a sturdy and well made 1.25″ eyepiece. The 6.5mm is aimed at giving high power views of astronomical targets. There is no rubber eyecup. I found this not to be too much of an issue, but does allow a little stray light in. The internal is silver rather than black, as used in higher end Ostara Plossls.

To test this eyepiece I used a 12″ Dobsonian with a focal length of 1500mm. This gave a magnification of 237x. First off was the Planet Uranus. Once located , a clear blue disc was seen. Seeing was not great with the planet being low down. But other than some ghosting and a little flare, the result was more than acceptable for a lower end eyepiece. In fact I would say better than expected.

Then I turned to the tricky target of the famous double / double star in Lyra. With patience both doubles could be split in two, but only just. A little flaring from the stars made things difficult, but the split was clear. I did test with a higher spec fully multi-coated eyepiece on the same targets to find much sharper results. The the eyepiece in question cost 8x more to buy.

Overall the Ostara 1.25″ PL 6.5mm is a good eyepiece that will do the job if on a budget

Click HERE to buy

 

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