Dave Weikel's Olympus E-10 Page
E-10 Home
E-20 Home
Disable the FL-40 Pre Flash
Depth of Field
Macro Lighting with the FL-40
Yoshimoto's EXIF Reader
Manual Focus Problem
RM-CB1 Cable Release
Short Course
MCON-35 Overview
TCON-300S Overview
Guest Gallery
Sample Images
E-10 Links

The Olympus TCON-300S Tele Extension lens is beautifully constructed and is well suited for tripod use. It is not a zoom lens, the E-10 must be set to it's full telephoto position (36mm) to avoid vignetting.
The whole kit


This is what you get for your money. The 3X extension lens, a support arm, two lens caps, a lens hood, the case and an instruction sheet.
Lens Components


Construction is excellent. Everything is a machine part or a machined casting. The lens hood uses a 49mm thread to screw onto the front of the 3X lens. The weight of the lens and support arm is 40.6 oz (1150g). The E-10 without batteries weighs 37 oz (1050g).
The Lens


The focus ring and the rear fitting use rubberized surfaces. The rest of the lens has a solid, smooth and generally precision feel.
Front View


There just isn't much to see on either end of the lens. As I mentioned, the filter thread is 49mm.
Rear View


You can see here that there is no mechanical connection between the TCON lens and the E-10 lens. The support arm sets the distance and alignment, and the front of the E-10 lens fits into the rubberized receiving ring shown here. The fit is snug to prevent light leaks.
Mounting the Lens


Mounting the lens to the camera is a two step process, starting by mounting the lens to the support arm. Notice the registration pins on both sides of the thumb screw.
Lens Mounted


Once the lens is attached to the support, it's time for the E-10. Use care to avoid touching the rear optic of the TCON with the lens barrel of the E-10.
Mounting the E-10


You must remove any filters that are on the E-10.

The E-10 is positioned and held in alignment by two registration pins.
Thumb Screw & Tripod Mount


The thumb screw shown here locks the E-10 to the support arm.

The tripod mount can be seen in the bracket just to the left of the thumb screw. It's located about 1.5 inches behind the neutral balance point. This makes the assembly "nose heavy" on a tripod.
Ready to go


The assembled package measures about 13.5 inches from lens to view finder, and weighs just over 5 lb.
Focus Range Ring


The focus range ring idea takes just a bit of getting used to. The idea is to preset the lens to operate within a range of distance. If the distance to the subject is within that range, the camera will autofocus as usual. In practice, I found myself using it more like a rough focus, never taking my eye away from the view finder.

The single page instruction sheet that comes with the lens is printed in 6 languages; Japanese, Chinese (I think), German, French, Spanish and English. The actual information content is minimal, just a couple of diagrams and a few basic instructions.

We finally got a bit of sun here today so I braved the cold and wind to get a few comparative samples.