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Entendendo as siglas das lentes


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33 respostas a este tópico

Partilhar Post #21 Rodi

Rodi

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Publicado 24 Maio 2010 - 17:40

Encontrei estas da Nikon que não estavam aqui (old stuff):

A -- The original bayonet lens type (1959). Manual focus lens. Considered Pre-AI

ADR -- Aperture Direct Readout. A fancy way of saying that aperture scale can be seen directly by the cameras that have overhanding prisms (ala F4, F5). Started with AI lenses in 1977.

ASP -- Lens has aspherical elements in its optic design.

C -- A lens coating type (Nikon Integrated Coating) for Pre-AI lenses. Distinguished by a C after the lens designation and a black filter ring.

CRC -- Close Range Correction, means that the lens was designs to provide superior focusing at close distances and with flat fields.

E -- A special type of AI lens (1977) introduced with the consumer-oriented EM body. Says Nikon Series E on the lens. Light in weight, plastic in construction, but optically good.

FX - FF from Nikon, for full format sensors.

IX -- Lenses for the Pronea system (Advanced Photo System). Can't be used on the 35mm or digital bodies.

K -- Another Pre-AI lens type, this time with rubber focus rings.

N -- Originally, the actual designation used for the first AI lenses; beginning in 2005 it now stands for Nano Crystal Coat, a special type of flare reduction coating applied to newer lenses.

NIC -- Nikon Integrated Coating. A fancy way of referring to Nikon's glass coating system, which is used to help reduce flare and ghosting.

RF -- Rear Focusing, means that lens achieves focusing by moving the rear elements; similar to IF.

SIC -- Super Integrated Coating, a multi-layer flare reduction coating, usually applied to the more complex zoom lenses.

Acronimos nos hoods da Nikon
HB Bayonet mount hood
HE Extension hood for long lenses that already have a hood
HK Slips onto the lens and then locks using a knob
HN Screw mount hood
HR Rubber hood, usually screw mount
HS Snaps onto lens like a lens cap



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Partilhar Post #22 Bruno Candeias

Bruno Candeias

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Publicado 17 Junho 2010 - 14:57

E falta dizer que 'lente' é uma superfície óptica simples - um vidro - e que uma 'objectiva' é formada por diversas lentes . Logo, aquilo que nós encaixamos nas câmaras é uma OBJECTIVA e não uma lente, que é o que os óculos ou as lupas têm.


é sempre bom aprender algo novo  :sim:


Partilhar Post #23 magg

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Publicado 27 Agosto 2010 - 17:02

está muito bem concebido este tópico mas se tivesse umas imagens das objectivas comas siglas esclarecia melhor pessoas como eu. fica a ideia


Partilhar Post #24 COZETO

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Publicado 01 Setembro 2010 - 11:00

"T" é a marca utilizada pela lente Zeiss , que significa que tem um revestimento anti-reflexo na superficie da lente Tessar .



Partilhar Post #25 SofiaS

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Publicado 15 Setembro 2010 - 17:28

Alguém sabe, de fonte segura, se a montagem da Tamron AF 17-50mm F/2.8 Di-II LD Aspherical é EF ou EF-S. Na verdade o que quero saber é se é possível usar a Tamron numa 5d.


Partilhar Post #26 Bruno Candeias

Bruno Candeias

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Publicado 15 Setembro 2010 - 19:15

É EF-S

DI II
Lenses for Digital SLR Cameras Only - Lenses are designed for exclusive use on digital cameras with smaller-size imagers and inherit all of the benefits of our Di products. These lenses are not designed for 35mm film cameras and digital cameras with image sensors larger than 24mm x 16mm.


Logo, não dá na 5D...


Partilhar Post #27 SofiaS

SofiaS

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Publicado 15 Setembro 2010 - 20:35

É EF-S

Logo, não dá na 5D...


Já desconfiava...! Obrigada  ;)


Partilhar Post #28 Bruno Candeias

Bruno Candeias

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Publicado 21 Setembro 2010 - 20:55

Só para experimentar, tentei "enfiar" a minha EF-S na minha EOS 650 e ela não entra mesmo, parece que bate no espelho  :wacko:

Mas a Sigma 18-200 entra perfeitamente, só que fica com os tais cantos escuros... mais vale não usar  :th_up:


Partilhar Post #29 jaraujo

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Publicado 07 Novembro 2010 - 01:52

Boa noite,

algumas das objectivas da NIKON e da CANON, têm um anel dourado, vermelho ou sem anel (se não estou em erro), julgo que este anel identifica as gamas/mercados para os quais elas estão vocacionadas…

Estou certo? Alguém sabe estas correspondências?

Muito obrigado.

Jorge Araújo


Partilhar Post #30 RenatoFonseca

RenatoFonseca

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Publicado 07 Novembro 2010 - 02:07

Boa noite,

algumas das objectivas da NIKON e da CANON, têm um anel dourado, vermelho ou sem anel (se não estou em erro), julgo que este anel identifica as gamas/mercados para os quais elas estão vocacionadas…

Estou certo? Alguém sabe estas correspondências?

Muito obrigado.

Jorge Araújo


Sei-te dizer que nas Canon é o famoso anel vermelho da gama ''L'' .


Partilhar Post #31 jaraujo

jaraujo

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Publicado 07 Novembro 2010 - 02:14

Sei-te dizer que nas Canon é o famoso anel vermelho da gama ''L'' .


Muito obrigado.

ou seja, nas canon existem apenas 2 gamas de objectivas, as L (Luxury) e as outras...É isso?


Jorge


Partilhar Post #32 Bruno Candeias

Bruno Candeias

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Publicado 07 Novembro 2010 - 10:42

Ainda existe o anel dourado em algumas, que é do motor de focagem USM, como esta:
Imagem Colocada

E o anel verde, que existe nas objectivas DO
Imagem Colocada


Partilhar Post #33 jaraujo

jaraujo

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Publicado 07 Novembro 2010 - 11:12

Ainda existe o anel dourado em algumas, que é do motor de focagem USM, como esta:
http://images01.olx.com.br/ui/1/76/84/15...

E o anel verde, que existe nas objectivas DO
http://dslr.com.au/media/catalog/product...


Pois...aparentemente a lógica dos aneis não é a mesma nas duas marcas...

Obrigado.

Jorge


Partilhar Post #34 Guest_levacv321_*

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Publicado 22 Dezembro 2016 - 06:45

Although it's a bit humiliating to admit, there was as soon as a time when I was a little anxious around members of the female persuasion. Throughout the years, however, I found out a couple of techniques to picking up appealing ladies, and it seems that there is actually a fair bit of overlap between making a winning sales presentation and winning over a romantic partner.

Bring in a (Romantic or Sales) Possibility.

This is the stage when you are just fulfilling somebody new, and wish to attract them. How can you best protect the opportunity of the person wanting to consult with you once again?

1. Make the most of the bandwagon impact. Have you ever observed that men or ladies who receive a great deal of attention from the opposite sex seem to be even more appealing? This is not a coincidence; it's the bandwagon effect. Individuals desire what everyone else wants. The Apple iPod, for example, doesn't do anything that previous MP3 players were not able to do, but that numerous individuals want it make it desirable. Making it appear as though everyone desires you (whether it's members of the opposite sex or sales clients) will instantly make you better, too.

2. Do not be desperate. This is the flip side of the previous point (making it seem that everybody desires you). You shouldn't appear as though you're overly desperate for a sale or a date. This isn't at all an appealing quality. You need to never come off as clingy.

3. Be imaginative! Using somebody a very first date of supper and a motion picture is extremely cliche and dull. Selecting an interesting and memorable first date experience, however, will make your potential date wish to meet you. Similarly, you must consider imaginative ways that will make your sales potential customers want to meet you. What extra benefits can you provide to make your product or service a lot more desirable?

Warming Up with the (Romantic or Sales) Prospect.

This stage is where the person has an interest in you, and now you have actually fulfilled for a very first date or sales meeting. What should you be concerned about now?

1. Do not require too big of a dedication too soon. Would you ever ask somebody on a first date to wed you? No, naturally not! That's far too big of a commitment! And, yet, I see salespeople all the time aiming to get people to dedicate to something they're not anywhere near prepared to devote to. Acknowledge that especially if you make huge sales, it may take a time period prior to the other individual wants to devote. Accept that, and get them to consent to smaller sized dedications in the short-term. In dating, you request for many small commitments in the form of dates before you proceed to larger dedications (vacationing together, meeting family, cohabiting, marriage, etc.) In sales, you should likewise strive smaller sized commitments in the beginning, and larger dedications in the future.

2. Gown properly. Let's face it; you will never make a sale or win a date just because you dressed well. However you can definitely lose sales or dates if you're dressed poorly. Ensure you present yourself well, so that you're prepared to take advantage of any opportunity that may emerge.

Dedicating or Proceeding.

Naturally, if you continue to advance with your (romantic or sales) possibility, then you may very well get the big commitment that you're looking for. If, nevertheless, things seem to peter out, be prepared to proceed. I've known far too many good friends who kept waiting, hoping that someday their things of love might one day feel the exact same way that they do. In doing so, they closed themselves off to numerous chance, therefore numerous better matches.

If the other person isn't really interested, he or she just isn't really interested. Thankfully, "there are numerous fish in the sea," as the saying goes. If it seems like your (romantic or sales) prospect isn't really going to move on and offer you a commitment, do not hesitate to invest your time elsewhere. It's a much better use of your time when you look to other people who are more likely to offer you a "yes.".

These are a couple of simple methods, however the outcomes might be rather extensive. Whether you're searching for dates or sales, you now have a number of methods to successfully court your potential customers.

Matt Vassar is a sales training consultant along with a teacher at Stanford University. His Tricks to Skyrocketing Sales system can be discovered at: 1-306-486-81136