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Amazon.com Review
Bushnell's Deep Space Series 675 x 4.5-Inch Reflector Telescope is a classic Newtonian reflector telescope with an equatorial mount and aluminum tripod. With its 4.5-inch primary mirror, this telescope has more than double the light gathering power of 76mm reflectors, and three times more than 60mm beginner scopes. The package includes three 1.25" size eyepieces (H20mm, H12.5mm, and SR4mm), a 3x Barlow lens, and a 5x24 optical finder scope.
Some assembly is required: I needed a Phillips screw driver and a small wrench to put the tripod together. The assembly process was not difficult, which is good because the instruction manual is not well illustrated. When I got the telescope assembled I noticed that the mirrors had become slightly misaligned during shipping. I used my own Collimation Tool to fine tune the optics. The reward for aligning the mirrors is sharp images of the moon and planets, even when I use the 4mm eyepiece for a magnification of 225x.
Bushnell's Deep Space 4.5-inch reflector includes three eyepieces and a 3x Barlow lens. The H20 eyepiece magnifies the image by 45x, just right for viewing the lunar disk. The H12.5 eyepiece (72x) helps to zoom in on the moon and planets. When the night air is still and clear, the 3x Barlow and H20 eyepiece can be combined for 135x magnification, and the SR4 eyepiece gives 225x which is close to the maximum reasonable power for a scope this size. Unfortunately, these economy grade eyepieces have a narrow field of view and don't seem very sharp. The low power H20 eyepiece, for example, doesn't have a wide enough field of view to take in all seven bright stars of the Pleiades or Seven Sisters cluster. The good news, however, is that eyepieces are easy to upgrade. An inexpensive 25mm plossl eyepiece has double the true field of view compared to the H20 eyepiece, making it easier to find and track objects in the night sky. This simple upgrade turns the Seven Sisters into a beautiful star cluster sprinkled edge to edge with dozens of tiny stars!
The best entry level telescopes have three qualities: decent optics, a steady mount, and good eyepieces. Bushnell's Deep Space 4.5-inch Reflector Telescope delivers two out of three at a bargain price. I suggest adding a collimation tool and at least one modern plossl eyepiece to make this a bargain you'll really enjoy. --Jeff Phillips
Pros:
- Low cost
- Decent optics
- Uses standard 1.25" eyepieces
- Economy-grade eyepieces
- Skimpy instruction manual
- Optics may need fine tuning
- 4.5-inch aperture mirror gathers light at up to 250 times the human eye
- Full-length variable tripod with equatorial mount for stability and steady viewing
- Focal ratio of f7.87, focal length of 900 mm, and magnification of 675
- Assembled of all-metal optical tube and high-quality glass optic objectives
- Designed for the beginning and intermediate amateur astronomer
Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope Reviews
Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope Reviews
| 13 of 15 people found the following review helpful:  Great Purchase, By Amazon Verified Purchase This review is from: Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope (Electronics) This was a great purchase. My first telescope. I've been looking to buy one for years, but couldnt find an affordable, yet, powerful telescope. This was the one. Controls are manual, but for any novice, the training is necessary. Will probably play around with this for a few months and consider buying additional lenses and filters. 3 of 5 people found the following review helpful: Good value for the price, By This review is from: Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope (Electronics) I have gotten it for a month. I'm very happy about it. It came with several upgrades, (1) it was 0.996 inch eyepiece, now 1.25 inch, (2) new aluminum tripod, not hardwood tripod, (3) Amazon shipped it as next-day dilivery. It's easy to assemble, but you have to balance the tube itself, then balance it with counter-weight. A beginner and/or intermediate astronomer should knows it. I don't see any problem. Don't lock those nuts when you move/transport it, a beginner and/or intermediate astronomer should knows it too. Not heavy, it's only a 4.5-inch. H type or SR type eyepiece is cheap, but you got 3 eyepieces. The similar products from Celestron only provide H20 only. The 3x borlow is not necessary when you have 3 eyepieces, H20, H12, SR4. The pratical limit for a 4.5-inch is 225x, just about the SR4. You won't gain any to use the borlow with SR4, except you could use it at daytime for a upside down image. The 675x is just an advertisement, I knew it before I... Read more 4 of 8 people found the following review helpful:  Not a Good Purchase for a Novice, By This review is from: Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope (Electronics) I bought this as a gift for a friend. We spent two weeks trying to figure out why we couldn't see anything in the lens. We gave up today and returned it. The directions are good for putting it together, but there is NOTHING in the directions on how to use or troubleshoot. The Bushnell website and calls to their helpline were also of NO USE. I would NOT recommend this telescope to a novice or anyone for that matter. It was more frustration than anything! |
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