Kollinear Series 11 This seems to be the most common from experience, and today are usually available if
you look. They were general purpose lenses with an extra rapid classification but also highly corrected and
with the advantage of being convertible to a lens of twice the focus.Thus it is useful for landscapes, long focus
work, interiors and copying. Unusually, no angle of cover is given in the USA list but two formats for each
focus are listed. The Layout is Voi012 and in 1914 it was made as:
f5.4 2.375in for 1.5x1.5in; 2.75in for 1.75x2.5in; 3.5in for 3.25x3.25in; 4.75in for 3.25x4.25in; 5.5in for
4.25x4.75in; 6.0in for 4x5in; 7.0in for 4.5x6.5in; 8in for 6.5x8.5in; and also 9.0in, 12, 13.5, 15, 17.5, 20cm;
f6.3, 25cm for 5x8in; 31cm for 6.5x8.5in, 37cm for 8x10in, 44cm for 12x15in , 52cm, 60cm for 14x17in. It
covers about 80° in all sizes. The above formats are at full aperture, and are increased at medium stops. Thus
the 6in then covers not 5x4in but even 5x7in.
All sizes from No2 to No6 ie 4.75in to 12in inclusive were avaialable as cells to fit to shutters.
This may not have applied in other years but the lenses seen fit the scheme. It is normally classed as a fine
lens but the f5.4 seen has not been a very useful lens in experience, but this example may have been poor.
The f6.8 and f6.3 are much sharper and less flarey. It was also covered by DRP 88,505. [Afalter seems to have
the same series of apertures and foci in Germany in 1910, but notes it covers 60°. This may be at full
aperture.]
Bookmarks