Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope
by Bushnell
Our Price: $150.00
Availability: Usually ships in 1-2 business days
Category: Digital Camera
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Digital Photo Product Details
Manufacturer: BushnellProduct features:
- 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
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Digital Cameras Photo Reviews of Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope
Customer Review: Good value for the price
Summary: 5 Stars
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 bought it.
I have used it to watch Moon, Jupiter, Mars inside the city limit of San Antonio, Texas durring sunsetting. The optic is good, or I should say it is what it should be. H type or SR type has short eye relief, but the image is clear and bright. When I used SR4, 225x, the image wobbled while I was adjusting focus. You have to let the planet image out, then 10 seconds late, it will be in the center and no shake at all. (Remember, you have a equatorial mount.) If you use H20 or H12, the focusing-wobble is not a problem. The view finder is relatively too small, its eye relief is short too.
Amazon sold it at $100 (plus $20 S&H), I think that it is a very good price-value.
Description of Bushnell 78-9518 Deep Space 675 x 4.5-Inch Reflector Telescope
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
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