Hi all,
I am revisiting this thread because a situation has arisen that allows me to acquire a pair of Canon binocs that I otherwise will never have the chance to do.
It seems that for my 15years of service I can select one of the following:
- A pair of the 18x50IS binocs
- A pair of the 15x50IS binocs
- A pair of the 10x42LIS binocs
Now, my profile has not much changed since this thread was active.
I am in a position where studying the moon, planets, satellites, constellations and so forth is very attractive and I am certainly going to get a good/solid tripod which all these binocs can be fitted to - despite having the IS feature I believe that using a tripod will assist with fatigue and control of the target area. I also will want to use them for terrestrial observation, matches, general observation and so forth.
I also see this as an opportunity to get as a service reward a product of a quality and type that I otherwise will never probably be able to...
This makes me carefully consider the 10x42 with the L series optics. I note that they were very favourably mentioned below for versatility. From what I have read the issues regarding the quality of the optics become very important when using for birding and astronomy and shere magnification is definitely only part of the equation.
The amount I can spend means that I have some significant change left over if I go with the 15x50s but the 18x50s and the 10x42s are the same value and max out my benefit.
It seems to me that the choice would be between the quality and versatility of the L series with 10x magnification knowing that whilst I won't see the extra detail of very distant objects the colour and optical integrity of all the viewing I do will be better; and the shear power in combination with the IS of the 18x.
I have tried the 10x42 and the 15x50 (I can't find an 18x to demo) and really don't have a problem finding and holding still or moving targets with either - although I can see that between 10 and 15 and 15 and 18 it is getting increasingly difficult to track moving targets.
The size and weight of the units is all much of a muchness and for serious viewing I guess I will have to either lie down and get used to handling them, or become comfortable with a tripod setup.
From what I read it is possible to see detail like the rings of saturn with the 18x and that on the 10x42L "Saturn definitely has "protrusions" and it is easy to see them as rings on the tiny target." -
http://www.cloudynights.com/item.php?item_id=1625 (I hope this link is not in contravnention of a site rule - please let me know or delete it if it is) This reviewer also, praising the optic quality of the L series talks about the 10x42L as a perfect ""crossover" binocular supporting the various uses requiring good optics with a stabile view and portability".
But I am not convinced that given the unlikely possibility of ever being able to access gear of this price range and inate quality again getting the maximum magnification isn't the best option. Wider field of view can then be acquired with cheaper binocs at any time in the future, but the ability to get either an L or 18x50 Canon won't come around again. I am not likely to spend another 15 years I think!
To summarise the main spec differences:
Quote:
18x50 IS
High magnification and image stabilizer - 18 x 50 IS ALL WEATHER offer a high magnification of 18X
- Visible images are rock-steady, thanks to Canon's unique Vari-angle Prism Optical Image Stabilizer technology
- Light-touch IS button with one-touch IS on and off
Tough all weather construction - Water resistant in all weather conditions, the 18 x 50 IS ALL WEATHER binoculars are suitable for use even in hard rain or at sea
- Full rubber skin provides shock resistance
- Dimpled surface provides a secure grip
- Large focusing and dioptric adjustment knobs provide excellent control, even with gloves
Outstanding optical performance - Large 50mm objective lens provides a bright image with a wide field of view of 67 degrees
- UD glass elements provide high resolution images with excellent colour saturation
- Porro II prism design offers superior transparency and brightness
- Super Spectra coating reduces flare and ghosting
- Field flattener produces excellent image flatness for high edge sharpness
- 15mm eye relief enables use with glasses
- 100% lead-free construction - environmental responsibility
Great range of other features - Accepts 58mm filters - eg. Polariser
- Tripod socket included
- Optional AE-B1 Anti-Fog Eyepiece available
Type
Prism binoculars
Magnification
15x (15x50IS)
18x (18x50IS)
Objective Lens
Effective Diameter: 50mm
Filter Threads: 58mm (P=0.75)
Real Field of View
15x50IS: 4.5 degrees (Field of View at 1000m: 79m)
18x50IS: (Field of View at 1000m: 65m)
Optical Construction
Objective Lens
4 elements in 3 groups (including protective glass. G3 uses UD glass)
Eyepiece Lens
7 elements in 5 groups
Exit pupil diameter
15x50IS: 3.3mm
18x50IS: 2.8mm
Eye Relief
15mm
Prism Type
Porro II prism
Pupil Distance Adjustment Range
58mm-76mm
Focusing and Dioptric correction
Focusing System
Objective Lens (G2-G4) movement
Focusing Method
Manual focusing by turning the focusing knob
L-R dioptic correction method
Adjustable with the right eyepiece lens
L-R dioptric correction range
+-3.0 diopters
Closest Focusing Distance
6m (19.7ft)
Dimensions & Weight
152x193x81mm (1180g body only)
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Quote:
10x42L IS
Image Stabilizer Function for steady viewing - Canon unique Vari-Angle Prism Image Stabilizer detecting and correcting handheld shake for ultra stable viewing
- Image Stabilizer is activated by pressing the Image Stabilizer button on top and continues to operate once released. Switches off automatically after 5 minutes.
- Uses 2 AA-size batteries allowing up to 4 hours viewing with Image Stabilizer
Waterproof capability - Special adhesives used to seal even the tiniest gaps making the binoculars waterproof
- Special metallic coating on exterior surfaces preventing fogging on the lens surfaces
Modern and Robust Design - Smoothly curved contours discouraging the built-up of water, salt or sand
- Durable rubber body ensuring firm and secure grip
- Thick protective rubber layer around objective lens providing excellent shock protection
- Tripod mounting socket available for use with a tripod
Outstanding Optical Performance - Ultra large 42mm lens diameter offering breathtakingly bright field of view
- 2 ultra-low dispersion lens elements providing crystal clear imaging performance
- Super Spectra coating to suppress flare and ghosting, giving bright, high-contrast images
- Environmentally friendly lead-free glass used in optical system
GENERAL
Magnification
10x
Objective lens diameter
Effective 42mm
Real field of view
6.5° (Field of view at 1000m: 114m)
OPTICAL CONSTRUCTION
Lens construction
Objective lens: 4 elements in 3 groups
Eyepiece lens: 7 elements in 5 groups
Exit pupil diameter
4.2mm
Eye relief
16mm
Prism type
Porro II prism
Pupil-distance adjustment range
57mm-75mm
FOCUSSING AND DIOPTRIC CORRECTION
Focusing system
Objective lens movement
Focusing method
Manual focusing by turning the focusing ring
L-R dioptric correction method
Adjustable with the dioptric correction ring
L-R dioptric correction range
±3.0 dioptres
Closest focusing distance
2.5m
IMAGE STABILIZER
Image Stabilizer system
Optical correction with Vari-Angle Prism
Correction angle
±0.8°
Shake detection system
Two gyro sensors
Image Stabilizer continuous operation time
+25°C: approx. 4 hours (using AA-size alkaline batteries)
GENERAL
Dimensions (WxDxH)
137 x 175.8 x 85.4mm
Weight
1030g (body only)
Operating environment
10°C to 45°C; 90% humidity
Standard accessories
Dedicated soft case, strap, objective lens cap, eyepiece lens cap
Power source
2x AA batteries
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Quote:
and the 15x50 IS
High magnification and image stabilizer - 15 x 50 IS ALL WEATHER offer a high magnification of 15X
- Visible images are rock-steady, thanks to Canon's unique Vari-angle Prism Optical Image Stabilizer technology
- Light-touch IS button with one-touch IS on and off
Tough all weather construction - Water resistant in all weather conditions, the 15 x 50 IS ALL WEATHER binoculars are suitable for use even in hard rain or at sea
- Full rubber skin provides shock resistance
- Dimpled surface provides a secure grip
- Large focusing and dioptric adjustment knobs provide excellent control, even with gloves
Outstanding optical performance - Large 50mm objective lens provides a bright image with a wide field of view of 67 degrees
- UD glass elements provide high resolution images with excellent colour saturation
- Porro II prism design offers superior transparency and brightness
- Super Spectra coating reduces flare and ghosting
- Field flattener produces excellent image flatness for high edge sharpness
- 15mm eye relief enables use with glasses
- 100% lead-free construction - environmental responsibility
Great range of other features - Accepts 58mm filters - eg. Polariser
- Tripod socket included
- Optional AE-B1 Anti-Fog Eyepiece available
Type
Prism binoculars
... otherwise same as 18x50IS
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I have done a lot of reading and research and still am not sure what will be the best decision. Ultimately only I can make that decision and then live with it - since there will be no returning them - as I read from a member of a us astronomy site who got the 18s because he had to go to the top of the line and then traded them for the 15s...
The only thing I can ask here is what peoples impressions are of the different magnifications, the importance of the optical quality of the L lens and some thoughts and ideas of "if I were you" suggestions.
Thanks for reading guys and for the advice so far - I am glad I didn't just jump in and buy but have continued to study the options and now have a marvelous opportunity to get something in return for the years I spent at Canon.
BTW I already have HD camcorder and EOS DSLR so binocs is what I have determined I want to get with this service reward.
Will