DE1290734B - Photographic telephoto lens - Google Patents

Photographic telephoto lens

Info

Publication number
DE1290734B
DE1290734B DEP1772334.1A DE1772334A DE1290734B DE 1290734 B DE1290734 B DE 1290734B DE 1772334 A DE1772334 A DE 1772334A DE 1290734 B DE1290734 B DE 1290734B
Authority
DE
Germany
Prior art keywords
value
telephoto lens
lens
refractive power
values
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.)
Pending
Application number
DEP1772334.1A
Other languages
German (de)
Inventor
Lautenbacher Hans
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.)
ENNA WERK OPTIK APELT
Original Assignee
ENNA WERK OPTIK APELT
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 ENNA WERK OPTIK APELT filed Critical ENNA WERK OPTIK APELT
Priority to DEP1772334.1A priority Critical patent/DE1290734B/en
Publication of DE1290734B publication Critical patent/DE1290734B/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B13/00—Optical objectives specially designed for the purposes specified below
    • G02B13/02—Telephoto objectives, i.e. systems of the type + - in which the distance from the front vertex to the image plane is less than the equivalent focal length

Description

Die Erfindung betrifft ein photographisches Teleobjektiv für Kleinbildkameras mit einem Bildformat von vorzugsweise etwa 24 x: 36 mm, dessen Uffnungsverhältnis etwa 1 : 3,5 und dessen Bildwinkel etwa 20" beträgt.The invention relates to a photographic telephoto lens for 35 mm cameras with an image format of preferably about 24 x: 36 mm, its aperture ratio about 1: 3.5 and the angle of view is about 20 ".

Der Erfindung liegt die Aufgabe zugrunde, ein photographisches Teleobjektiv der zuvor bezeichneten Art zu schaffen, welches besonders wirtschaftlich und auch kostensparend herstellbar ist, so daß es preiswert auf den Markt gebracht werden kann und dennoch qualitativ hohen Ansprüchen genügt.The invention is based on the object of a photographic telephoto lens of the type described above, which is particularly economical and also Can be produced cost-effectively, so that it can be put on the market at low cost can and still meet high quality standards.

Zur Lösung dieser Aufgabe wird ein Teleobjektiv, bestehend aus einem dreilinsigen Frontglied positiver Brechkraft und einem von diesem durch einen relativ großen Luftraum getrennten, bildseitig angeordneten zweilinsigen Glied negativer Brechkraft zugrunde gelegt, welches erfindungsgemäß im wesentlichen die nachstehenden Konstruktionsdaten aufweist: nd-Wert Vd-Wert f.t = -4-60,00 Lt dt = 2,4 1,51680 64,17 r2 = +370,00 h = 0,2 r3 = +29,10 L2 d2 = 4,9 1,52249 59,48 r4 = -233,00 12 = 0,6 r5 = -I98,00 L3 d3 = 1,5 1,62536 35,56 r, _ +39,281 13 = 41,2 Blendenraum r, _ +52,577 1-4 d4 = 1,7 1,62374 47,00 r8 = +2000,00 14 = 5,7 r, = -29,00 L5 d5 = 1,5 1,55232 63,46 rto = -188,45 Brennweite: f = 100. Im Rahmen der Erfindung können die vorstehend angegebenen Werte der Brechkräfte dem Betrag nach bis zu 0,15 der Brennweite und die Werte der Linsendicken dem Betrag nach bis zu 0,15 der Brennweite von den in der vorstehenden Tabelle angegebenen Werten abweichen.To solve this problem, a telephoto lens consisting of a three-lens front element with positive refractive power and a two-lens element with negative refractive power, which is separated from this by a relatively large air space and is arranged on the image side, is used as a basis, which according to the invention essentially has the following design data: nd value Vd value ft = -4-60.00 Lt dt = 2.4 1.51680 64.17 r2 = +370.00 h = 0.2 r3 = +29, 1 0 L2 d2 = 4.9 1.52249 59.48 r4 = -233.00 12 = 0.6 r5 = -I98.00 L3 d3 = 1.5 1.62536 35.56 r, _ +39.281 13 = 41.2 aperture space r, _ +52,577 1-4 d4 = 1.7 1.62374 47.00 r8 = +2000.00 14 = 5.7 r, = -29.00 L5 d5 = 1.5 1 , 55232 63.46 rto = -188.45 Focal length: f = 100. Within the scope of the invention, the values of the refractive powers given above can deviate from the values given in the table above by up to 0.15 of the focal length and the values of the lens thicknesses by up to 0.15 of the focal length.

Das erfindungsgemäß ausgebildete photographische Teleobjektiv entsprechend den vorstehenden Daten ist in der Zeichnung schematisch dargestellt.The photographic telephoto lens designed according to the invention accordingly the above data is shown schematically in the drawing.

Die Erfindung liegt in der besonders vorteilhaften Auswahl besonders geeigneter und wirtschaftlich einsetzbarer Glassorten und in der günstigen Form der Linsen. Dadurch ist es möglich, die für das erfindungsgemäß ausgebildete Teleobjektiv bestimmten Linsen außerordentlich preisgünstig und rationell herzustellen, so daß die effektiven Kosten für das Teleobjektiv beträchtlich unter denjenigen vergleichbarer Teleobjektive liegen, die einen größeren Aufwand in bezug auf den Materialeinsatz als auch die Herstellung erfordern.The invention lies particularly in the particularly advantageous selection suitable and economically usable types of glass and in the favorable form of the lenses. This makes it possible for the telephoto lens designed according to the invention produce certain lenses extremely inexpensive and efficient, so that the effective cost of the telephoto lens considerably below those of comparable Telephoto lenses are located, which require a greater effort in terms of the use of material as well as require manufacture.

Claims (1)

Patentanspruch: Photographisches Teleobjektiv für Kleinbildkameras mit einem Bildformat von vorzugsweise 24 - 36 mm, bestehend aus einem dreilinsigen Frontglied positiver Brechkraft und einem zweilinsigen bildseitigen Glied negativer 'Brechkraft, zwischen welchen sich ein großer Luftraum befindet, dadurch gekennzeichnet, daß es bei einer Brennweite von f = 100 im wesentlichen die folgenden Konstruktionsdaten aufweist: Öffnungsverhältnis: etwa 1 :3,5 Bildwinkel: etwa 20°. nd-Wert I Vd-Wert rt = +60,00 Lt dt = 2,4 1,51680 64,17 r2 = +370,00 h = 0,2 r3 = +29,10 L2 d2 = 4,9 1,52249 59,48 r4 = -233,00 12 = 0,6 r5 = -198,00 L 3 d; = 1,5 1,62536 35,56 r, = -I-39,281 13 = 41,2 Blendenraum
Fortsetzung T nd-Wert Vd-wert +52,577 L4 d., = 1,7 1,62374 47,00 IH = +2000,00 4 = 5,7 rt3 -29,00 L5 d5 = 1,5 1,55232 63,46 I,1" - -188,45
wobei die Werte für die Brechkraft als auch die Werte für die Dicke der einzelnen Linsen bis zum 0,15fachen Wert der Brennweite von den angegebenen Werten abweichen können.Claim: Photographic telephoto lens for 35 mm cameras with an image format of preferably 24-36 mm, consisting of a three-lens front element with positive refractive power and a two-lens image-side element with negative refractive power, between which there is a large air space, characterized in that it has a focal length of f = 100 essentially has the following design data: Focal ratio: about 1: 3.5 Angle of view: about 20 °. nd value I Vd value rt = +60.00 Lt dt = 2.4 1.51680 64.17 r2 = +370.00 h = 0.2 r3 = +29.10 L2 d2 = 4.9 1.52249 59.48 r4 = -233.00 12 = 0.6 r5 = -198.00 L 3 d; = 1.5 1.62536 35.56 r, = -I-39.281 13 = 41.2 aperture space
continuation T nd value Vd value +52.577 L4 d., = 1.7 1 , 62374 47.00 IH = +2000.00 4 = 5.7 rt3 -29.00 L5 d 5 = 1.5 1.55232 63.46 I, 1 "- -188.45
The values for the refractive power as well as the values for the thickness of the individual lenses can deviate from the specified values by up to 0.15 times the value of the focal length.
DEP1772334.1A 1968-04-30 1968-04-30 Photographic telephoto lens Pending DE1290734B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DEP1772334.1A DE1290734B (en) 1968-04-30 1968-04-30 Photographic telephoto lens

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEP1772334.1A DE1290734B (en) 1968-04-30 1968-04-30 Photographic telephoto lens

Publications (1)

Publication Number Publication Date
DE1290734B true DE1290734B (en) 1969-03-13

Family

ID=5701209

Family Applications (1)

Application Number Title Priority Date Filing Date
DEP1772334.1A Pending DE1290734B (en) 1968-04-30 1968-04-30 Photographic telephoto lens

Country Status (1)

Country Link
DE (1) DE1290734B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5165931A (en) * 1974-12-05 1976-06-08 Miranda Kamera Kk Kogatakeiryono boenrenzu
JPS5653726B2 (en) * 1978-07-17 1981-12-21

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049120B (en) * 1955-07-19 1959-01-22 Enna Werk Optik Apelt Photographic telephoto lens

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1049120B (en) * 1955-07-19 1959-01-22 Enna Werk Optik Apelt Photographic telephoto lens

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5165931A (en) * 1974-12-05 1976-06-08 Miranda Kamera Kk Kogatakeiryono boenrenzu
JPS5653726B2 (en) * 1978-07-17 1981-12-21

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