Many home made and commercial viewing tubes or scopes are made with a flat lens.
A flat lens requires the blocking of all peripheral light entering into the tube in order to eliminate undesirable internal reflection. Internal reflection impairs the viewing quality. The Aqua Scope II, Aqua Explorer and Aqua Scope VI are all designed with a tilted lens affording the viewer an unobstructed view (no internal reflection) regardless of peripheral light, therefore it is not necessary to have one's face in contact with the view mask in order to eliminate unwanted reflection. With the tilted lens, the scope may be held at any desired distance for viewing and maintain a reflection free view.
The Aqua Scope II™ Viewing Scope (Code: AS)
The Aqua Scope II™ viewing scope is used for vernal pool surveys, Secchi disk readings, and aquatic plant studies and animal observations (macro invertebrates, mollusks, aquatic salamanders and others). The innovative design, with its tilted lens, eliminates both surface glare as well as internal reflection. This feature allows for consistent viewing parameters regardless of environmental conditions.
Other special features of this product are: a black interior, floatation collar, neoprene viewing mask and a comfortable handle. The scope is made of a crush resistant tube with an overall length of 26".
Aqua Scope VI™ Viewing Scope (Code: AS6)
The Aqua Scope VI offers the viewer 2.25 times more viewing area than the 4 inch viewing scope. The 6 inch diameter is ideal for surveying aquatic invasive vegetation such as water chestnut, Eurasian watermilfoil, hydrilla and others. The innovative design, with its tilted lens, eliminates both surface glare as well as internal reflection. This feature aids in achieving consistent viewing parameters regardless of the environmental conditions. Other special features are: a black interior, floatation collar and neoprene viewing mask (which accommodates eye wear), and two sturdy handles. The ASVI is approximately 32 inches in length.
View Bucket (Aqua Explorer View Bucket) Code: VB
This aquatic view bucket is made of a rugged 5 gallon bucket with the lid containing an acrylic lens, which yields a 9¼ inch viewing area. The lens is recessed in the lid to provide protection from abrasion when the bucket is set down. The acrylic lens is replaceable. The black interior cuts down on the internal reflection. The two handles make for stable maneuvering and the all stainless steel hardware resist corrosion in both fresh and salt water. The View Bucket is ideal for observing streambed morphology, invasive aquatic plants and the monitoring of other aquatic life as well as locating moorings and other lost items.