I carry three eyepieces with me when using the apo-Televid 77. Why?
20x WW (41009)
32x WW (41011)
40x WW (41007)
30-60x Zoom (41005)
Now to the eyepieces I carry with me:
I usually have the 40x WW (41007) fitted. It has a 1.8° angle of view (32 metres field at 1000 metres) and an exit pupil of 1.8 mm. It is a superb lens. But if the light is relatively low or a wider field is needed, then I can quickly switch to the 32x WW (41011) (2.3° angle of view — 40 metres field at 1000 metres; 2.3 mm exit pupil). Another superb lens. If the light really starts to fade or if I want to scan and count then the 20x WW (41009) comes into its own. This gives a 3.45° angle of view (60 metre field at 1000 metres) with an exit pupil of 3.45 mm.
|40x WW fitted on the Apo-Televid 77|
The value of carrying three eyepieces was illustrated by an evening in the Eric Morecambe Hide at the RSPB’s Leighton Moss reserve. A flock of Black-tailed Godwits looked superb with the 40x WW but as the light began to fade, the 32x WW was needed. As the colours began to become indistinct, a quick change to the 20x WW brought the scene back to life.
|The three WW eyepieces I carry|
A factor in choosing eyepieces is digiscoping. It is worth noting that the Leica Digital Adapter 2 (42303) nor the Digilux 1 Adapter (42302) will not fit either of the 40x eyepieces. The diameter of the various eyepieces for fitting digiscoping collars are: 54 mm (32x WW); 53 mm (20x WW and 20-60x); 50 mm (40x WW); 45 mm (40x). It is worth talking to SRB Griturn about digiscoping adapters for all these eyepieces.
SRB Griturn can be found at: http://www.srb-griturn.com
|Leica Digital Adapter 2 (42303) fitted to 32x WW eyepiece|
Finally, these eyepieces were also made for the Televid 62 but have lower magnifications (by a factor 0f 0.8). 40x becomes 32x, and 32x becomes 26x on the Televid 62.