DE2818394C2 - Large format photographic taking lens - Google Patents

Large format photographic taking lens

Info

Publication number
DE2818394C2
DE2818394C2 DE19782818394 DE2818394A DE2818394C2 DE 2818394 C2 DE2818394 C2 DE 2818394C2 DE 19782818394 DE19782818394 DE 19782818394 DE 2818394 A DE2818394 A DE 2818394A DE 2818394 C2 DE2818394 C2 DE 2818394C2
Authority
DE
Germany
Prior art keywords
large format
taking lens
lens
format photographic
lenses
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
DE19782818394
Other languages
German (de)
Other versions
DE2818394B1 (en
Inventor
Muenchen 8000
Franz Schlegel
Josef Weiss
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Optische Werke G Rodenstock
Original Assignee
Optische Werke G Rodenstock
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optische Werke G Rodenstock filed Critical Optische Werke G Rodenstock
Priority to DE19782818394 priority Critical patent/DE2818394C2/en
Publication of DE2818394B1 publication Critical patent/DE2818394B1/en
Application granted granted Critical
Publication of DE2818394C2 publication Critical patent/DE2818394C2/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B9/00—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or -
    • G02B9/12—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only
    • G02B9/14—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - +
    • G02B9/16—Optical objectives characterised both by the number of the components and their arrangements according to their sign, i.e. + or - having three components only arranged + - + all the components being simple

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lenses (AREA)

Description

D'n Erfindung bezieht sich auf ein fotografisches Aufnahmeobjektiv Tür Großformat nach dem Oberbegriff des Patentanspruchs. The invention relates to a large format door photographing lens according to the preamble of the patent claim.

Ein dem erfini'ungsgemäßen Objektiv in seinem grundsätzlichen Aufbau vergleichbares Objektiv ist aus der deutschen Patentanmeldung 27 06 498 bekannt. Pas bekannte Objektiv ist jedoch als lichtstarkes Vergrößerungsobjektiv ausgebildet, das einen Bildwinkel von nur 38 aufweist. Seine Linsen bestehen aus teuren Glassorten (LAK 9 und SF 5).A lens according to the invention in his A lens that is comparable in principle is known from German patent application 27 06 498. However, the known lens is designed as a high-speed magnifying lens, the one Angle of view of only 38. His lenses are made of expensive types of glass (LAK 9 and SF 5).

Aufgabe der Erfindung ist es, ein preiswert herstellbares Aufnahmeobjektiv für Großformate zu schaffen, das einen Bildwinkel von mindestens 56 zuläßt und bei halber Blende vignettierungsfrei arbeitet.The object of the invention is to create an inexpensive production lens for large formats, which allows an angle of view of at least 56 and works vignetting-free at half aperture.

Diese Aulgabe wird dadurch gelöst, daß das Objektiv der bekannten Art die im Kennzeichen des Patentanspruchs angegebenen Konstruktionsdaten aufweist. Das erfindungsgemäße Objektiv erfüllt die der Aufgabe zugrunde liegenden Bedingungen unter anderem dadurch, daß seine beiden eintrittsseitigen Linsen sehr stark wirkende Linsen sind, wobei der eintrittsseitige Luftraum sich zum austrittsseitigen Luftraum etwa wie 6: 1 verhält.This task is achieved in that the lens of the known type has the design data specified in the characterizing part of the patent claim. The objective according to the invention fulfills the conditions on which the object is based, inter alia, in that its two entry-side lenses are very powerful lenses, the entry-side air space being approximately 6: 1 to the exit-side air space.

Die Linsen des Objektives bestehen aus preiswerten Gläsern (SK 16, LLF I und BK 7). Das erfindungsgemäße Objektiv kann vorzugsweise eine Brennweite von 210 mm aufweisen.The lenses of the objective consist of inexpensive glasses (SK 16, LLF I and BK 7). The inventive Objective can preferably have a focal length of 210 mm.

Die Zeichnung zeigt einen axialen Schnitt durch das erfindungsgemäße Objektiv, wobei die Radien der einzelnen Linsenflächen mit r, die Dicken der Linsen mit J und die Luftabstände mit / bezeichnet sind. Zusätzlich sind im Patentanspruch die Brechzahlen der verwendeten Gläser mit Ji1. und die Abbeschen Zahlen mit C1., jeweils für den Spektralbereich e bezeichnet.The drawing shows an axial section through the objective according to the invention, the radii of the individual lens surfaces being denoted by r, the thicknesses of the lenses by J and the air gaps denoted by /. In addition, in the claim, the refractive indices of the glasses used are Ji 1 . and the Abbe numbers with C 1. , each denoted for the spectral range e.

Im Rahmen der Erfindung sind geringfügige Abweichungen von den in der Zahlentabelle des Patentanspruchs angegebenen Werten möglich, soweit hierdurch die Abbildungseigenschaften des Objektives nicht nennenswert beeinflußt werden.In the context of the invention, there are slight deviations from those in the table of figures of the patent claim specified values are possible, as far as the imaging properties of the objective are not significantly influenced.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims (1)

Patentanspruch:Claim: Fotografisches Aufnahmeobjektiv für Großformat, bestehend aus zwei Sammellinsen, einer zwischen diesen angeordneten Streulinse und einer Blende zwischen den beiden hinteren Linsen, g ekennzeichnet durch folgende, auf eine Brennweite/' = !00 bezogene Daten:Large format photographic lens, consisting of two converging lenses, one between these arranged diverging lens and a diaphragm between the two rear lenses, marked e by the following data related to a focal length / '=! 00: /' = 100/ '= 100 T1 = +15,85T 1 = +15.85 r2 = -490,61r 2 = -490.61 r3 = -72,10r 3 = -72.10 r4 = +14,54r 4 = +14.54 r3 = +179,ίίύr 3 = + 179, ίίύ JV, = -67,33JV, = -67.33 :6,8: 6.8 IQIQ i/, = 2,50 1,6229 60,07i /, = 2.50 1.6229 60.07 /, = 1,62
(I1 = 0,38 1,5510 45,47/, = 1.62
(I 1 = 0.38 1.5510 45.47 I2 = 7,74 + 2,29 = 10,03 >o di - 3,86 1,5 !87 63,96 I 2 = 7.74 + 2.29 = 10.03> o di - 3.86 1.5! 87 63.96
DE19782818394 1978-04-27 1978-04-27 Large format photographic taking lens Expired DE2818394C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19782818394 DE2818394C2 (en) 1978-04-27 1978-04-27 Large format photographic taking lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782818394 DE2818394C2 (en) 1978-04-27 1978-04-27 Large format photographic taking lens

Publications (2)

Publication Number Publication Date
DE2818394B1 DE2818394B1 (en) 1979-04-12
DE2818394C2 true DE2818394C2 (en) 1980-01-03

Family

ID=6038095

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19782818394 Expired DE2818394C2 (en) 1978-04-27 1978-04-27 Large format photographic taking lens

Country Status (1)

Country Link
DE (1) DE2818394C2 (en)

Also Published As

Publication number Publication date
DE2818394B1 (en) 1979-04-12

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Legal Events

Date Code Title Description
OI Miscellaneous see part 1
8339 Ceased/non-payment of the annual fee