North Lincolnshire astronomy society meeting. July 2015

SW 130 DPS northern optics

The North Lincs astronomy society met at Far ings nature reserve on Monday 7th July..We had a very interesting talk by Chris Roche on how to use a planisphere. We were all amazed at how much information such a simple looking product can give.Chris also gave us a run down on 3 interesting objects to view in the night sky this month.

This was followed by Steve Berry and Charles Thody giving us all a practical demonstration on various astronomy related apps for various devices

Despite the poor weather that allowed no observing, around 20 members attended

Many thanks to Far ings for the use of the facilities and Sarah the tea lady for the excellent refreshments

For more info on the society http://northlincsastro.org/

 

 

 

 

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Barr and Stroud Sahara 8×25 vs 10×25 binoculars comparison

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I had the chance today to test the subtle differences between the Barr and Stroud Sahara 8×25 and 10×25 binoculars.

For starters they came in a different design of box. The 10x came in a largely white box with the binoculars image on it. While the 8x came in a more colourful one. I know that this will vary depending on which batch you have bought from

Both binoculars look and feel the same. The 8x focus wheel was slightly more free moving. But I would imagine this again like the boxes will vary. Both are minor details, rather than an issue.

So what about the optics…There is a slight brightness / contrast increase with the 8x, with also a wider view..That said, the brightness difference was very minimal and most certainly not a problem in cloudy conditions with the 10x version.

Chromatic aberration and edge of field bowing was equal with both sets, and well within tolerances for compact binoculars in this price range

Surprisingly eye relief was about the same on both. Meaning both sets could be used with spectacles on.

One big difference that may be an issue for some users is depth of field. On the 10x we found you needed to work the focus wheel more to keep sharp focus..On the plus side, for all work except close up observations a 1/4 turn of the focus wheel was all that was needed

Summing up. Both are great sets on compact binoculars for a range of uses. The 8x with its wider field of view and larger depth of field may be better suited to fast moving wildlife. The 10x would be ideal for more distant targets where less panning is used

Both sets are highly recommended  by, and can be purchased from Northern Optics

 

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Celestron Omni 2x barlow lens (1.25″) First impressions on quality

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Celestron Omni 1.25″ 2x barlow lens
Doubles the magnification of any 1.25″ eyepiece without losing any eye relief
Compared to our standard Celestron 2x Barlow, the Omni version has fully multi-coated optics
for maximum light transmission with reduced loss in quality
Blackened internal body also helps reduce reflection , and so help increase contrast.
Each lens is also blackened on the edges to help reduce internal reflection
The Omni is beautifully engineered , yet slightly lighter than the standard model.
A very stylish and smooth silver / chrome finish makes this barlow very attractive, and will
not look out of place in any eyepiece set
Comes complete with lens caps and is retail boxed

Available to purchase from Northern Optics

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First chance to look at the new Helios Aquila MS binoculars

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In an increasingly popular size, the recent ranges of porro prism 32mm binoculars are a great choice, in-between
the standard 42mm porro prisms and 25mm roof prism designs.
Aimed at general use and birdwatching, these mid sized binoculars are easly carried one one place to another without weighing you down.
BaK-4 prisms and multi-coated optics should give a bright image with good contrast. Just what birdwatchers need.

Long eye relief foe spectacle wearers and a nitrogen gas filled body adds to the value. And at only £69.99 they
represent excellent value for money

Supplied with neck strap and case
Available to purchase from Northern Optics

SPECIFICATIONS:

Model AQUILA MS
Specification 6.5×32 8.5×32
Magnification 6.5x 8.5x
Object Lens Diameter 32mm 32mm
Field of view 8.2° 7.8°
F.O.V.@1000M 143m 128m
Nearest Focus Distance 3.5m 5m
Eye Relief 17mm 14mm
Length 127mm 127mm
Weight 500g 520g
Product Code 30133 30134
Price £69.99 £69.99
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Celestron Power Seeker 80 AZS. Testing prime focus photography

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I have had a chance to test the prime focus performance of the Celestron powerseeker 80 AZ..
To connect a DSLR camera, you simply attach a t-ring to the telescope focuser..There is a t-thread on the scope, so no need to buy a t-adapter.
A photos below are unedited and not cropped / sharpened in anyway…Camera settings were 400 ISO , 2.5MP on AE.

Image one was taken through my own Tamron 70-300mm @ 300mm at f8.
Image two was taken using the Celestron 80 AZ..This makes is a 400mm f5..The image is a little softer than the camera lens..But no doubt if I used magnified live image, and sharpened up in editing the results will be much better.The difference in magnification between the camera at 300mm and the 400mm of the scope is obvious.
Thirdly I took a more distant target to check for vignetting. There obviously is some, but this can be cropped out in editing..Great news is that unlike some refractors, no extension tube is needed.

Summing up. It is not a high end camera lens, but for the money is an affordable compromise..Should be ideal for wide field astronomy..Much better optics than the travel-scope 70..Just a shame it wont fit on a camera tripod or EQ mount unless you can fit tube rings..So you are stuck with the very capable celestron one..No image stabilisation , so a remote is a must have..

Available to buy from Northern Optics

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Celestron astromaster leg clips 8001905

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Replacement tripod leg clip for Celestron Astromaster telescopes
Also fits Celestron SLT and Skywatcher AZ-GOTO mounts
Fixes between the tripod leg and accessory tray
Flexible plastic construction
Nut and bolts not included
One clip is included

Available to purchase from Northern Optics

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Visionary metallic neck strap

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Visionary metallic neck strap for a variety of uses
Attaches to any compact camera, smartphone or other device with loop connector
Very attractive silver finish
Strong metallic inner, with clear plastic outer for weather protection and a nice smooth feel
A very handy and useful accessory for keeping your devices close to hand.
Great as a gift idea
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Ostara filter wallet

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Useful and well priced filter wallet from Ostara
Holds up to six 1.25″ telescope filters (4 in cases or 6 not in cases)

Ideal for keeping your filters in an inside pocket for easy and fast access when needed.
Filters are one of those small astro accessories that are easy to lose. No such worries here,
with the Ostara filter wallet to keep them all together

The case is an attractive black finish with light blue inner
Nylon construction
Velcro fastener
Light padding

On testing we found you could fully close the wallet with up to 6 filters not in their cases (lose)
or 4 filters in their cases

19cm x 8.5cm x 3cm when folded (The 3cm will vary depending on how many filters are packaged

Available to purchase from  Northern Optics

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North Lincolnshire Astronomy society meeting. 2nd February 2015

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Despite the cold weather and risk of snow, around 17 hardy souls came to the North Lincs astro meeting on the 2nd February 2015.

The talks this month were by Chris Roche and Steve Berry talking about their observatories. It was a very light hearted and very light hearted look at what observatories can be accommodated in a back yard.

The two versions were completely different. One was a pre made fibre glass one, and the other a home made wooden version with a roll on – roll off roof

More information about the North Lincs astro society can be found on the Northern Optics website

 

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Kepler Optik 3-way tripod head. TM-12

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The Kepler Optik 3-way head, TM-12 is one of the best value tripod heads I have come across. Silky smooth movement in Pan, Tilt and angle makes it a joy to use. Ideal for both photographic and spotting scope use. Bubble level included

The handles are large enough to use with gloves on. For security, there is a locking pin to prevent the plate coming lose. The plate is also quick release. Perfect for use with all Olivon tripods

Various tripods and heads are available to purchase from Northern Optics

 

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