Grubb Aplanat

1857

T. Grubb

Dublin

Lens Type:

Single achromat.

c. 15". Washer stops. Brass mount with extending front section.

Serial Number:

3510 .

Notes:

Barrel engraved ' Sold by Morley 70 Upper St. 6012'. Morley's number of 6012 is also on the flange.

With:

Flange.

Consists of a meniscus crown in front of a meniscus flint. The extending front located the diaphragm in the correct position. The lens gave low spherical aberration. It was advertised in the following sizes:

Lens diameter	Focus	Plate Size
2"	9"	6" x 5"
2 ½	12	9 x 7
3	15	10 x 8
3 ½	18	12 x10
4	21	15 x 12
5	25	18 x 16
6	30	22 x 20
⅞	3 ¾	Stereo or 3 x 3
1	4 ½	"
1 ⅛	6	"
2	8 ¼	Stereo or 4 x 4
1 ¼	6	"
1 ⅜	7	"

References & Notes:

BP 2574/1857. G. Knight Cat. 1864, p. 12. Soloman Cat. 1863, p 11. Abney, Instruction, p. 90. Kingslake, p. 28.

Early Photography

Grubb Aplanat

1857

T. Grubb

Dublin

Lens Type:

Serial Number:

Notes:

With:

References & Notes:

Early Lenses

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