Minimun ApetureNikon Lenses (Page 2): I'm curious as the op. I will use this land for astrophotography and street photography. At this time I have AD 500 but will eventually go full...

dyximan

I'm curious as the op. I will use this land for astrophotography and street photography. At this time I have AD 500 but will eventually go full frame. When I shoot astrophotography I think manual would be fine because I could set it at infinity. But for street photography curious as to the opinions of those who do it would auto focus be good, And/or better than manual. The reason I ask is that I understand a lot of street photographers set their Lens at a particular focal length in anticipation of their subject and shoot away. Obviously auto focus and full frame lenses cost more. My other question is would you buy a 50 mm a 35 mm or something wider. I'm trying to keep the cost under a 1000
I would also occasionly use this lens inside buildings museums etc.

dyximan

Also of the tamron Sigma, nikon, which bran would you choose, stick with the native Nikon or branch out to one of the third party lenses. As there seems to be dramatic price differences in brands etc.

dyximan

As I will be using this lens primarily for low light and night Photography, will I need the lens with the higher number of blades and the various coatings on the lens.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

Architect1776 wrote:

I would go f1.2 or f1.4 if you cannot afford the f1.2.
I love my f1.2.
f1.4 is an excellent alternative to the f1.2.
f1.8 is a distant third place and does not compare to the other 2.

The 1.8 as sharp as the 1.2 and 1.4 and almost as fast, your talking fractions of a stop. To say the 1.8 does not compare to the other two is quite a stretch.
I have owed all three, have you? I have shot all three, have you? I have compared the results, have you? IMHO, and as a result of having seen the results of the three lenses, the 1.8 is AS SHARP as the other two.

aellman Loc: Boston MA

Pablo8 wrote:

I'm sure F1.2/4 is not a recognised aperture for a Nikon lens. f/1.2 and f/1.4 are maximum apertures for 50mm lenses.

I assume the OP is referring to f1.2 OR f4, but if he's a newbie, he could be confused.

billnikon Loc: Pennsylvania/Ohio/Florida/Maui/Oregon/Vermont

aellman wrote:

I assume the OP is referring to f1.2 OR f4, but if he's a newbie, he could be confused.

He stated he should have typed 1.4 instead of f4.

dyximan

No I'm not that new, And like so many here why don't you ask the op what he meant and not make assumtions. Jf you had looked at my thread you would see that I distinctly pointed out 1.21.4 and 1.8 I'm well aware that an F1.2 is far different from that of AF4, And Had you read the entire thread you would note that my questions were always around low light situations which I'm aware F4 is not nearly good enough for low light and potential handheld low light situations. That being said if there is very little difference between an F1.8 and an F1.2 what would that equate to in stops. A 1/2 a stop a 1/3 of a stop?

geezer7 Loc: Michigan

The number of stops between two different f-stops can be calculated fairly simply. Just take the ratio of the two f-stops. For example 1.8/1.2=1.5, then square the quotient so 1.5^2=2.25. Now divide by 2 to get the number of stops so 2.25/2=1.125. Accordingly the number of stops between f1.4 and f1.8 is .46 and the number of stops between f1.2 and f1.4 is .68. Accounting for rounding, the difference between f1.2 and f1.8 is the sum of the previous stops (.46+.68). Hope this helps.

aellman Loc: Boston MA

geezer7 wrote:

The number of stops between two different f-stops can be calculated fairly simply. Just take the ratio of the two f-stops. For example 1.8/1.2=1.5, then square the quotient so 1.5^2=2.25. Now divide by 2 to get the number of stops so 2.25/2=1.125. Accordingly the number of stops between f1.4 and f1.8 is .46 and the number of stops between f1.2 and f1.4 is .68. Accounting for rounding, the difference between f1.2 and f1.8 is the sum of the previous stops (.46+.68). Hope this helps.

dyximan

geezer7 wrote:

The number of stops between two different f-stops can be calculated fairly simply. Just take the ratio of the two f-stops. For example 1.8/1.2=1.5, then square the quotient so 1.5^2=2.25. Now divide by 2 to get the number of stops so 2.25/2=1.125. Accordingly the number of stops between f1.4 and f1.8 is .46 and the number of stops between f1.2 and f1.4 is .68. Accounting for rounding, the difference between f1.2 and f1.8 is the sum of the previous stops (.46+.68). Hope this helps.

Absolutely you can't argue with simple mathematics and physics thank you numbers don't lie that's all I need to know, So just a little over one stop from 1.2 and the 1.8 So one stop of Shutter or one stop of aperture thank you

dyximan

Big #/little# squared/2 Is this the simple form

aellman Loc: Boston MA

dyximan wrote:

Big #/little# squared/2 Is this the simple form

Beautiful.

dyximan

Ty

geezer7 Loc: Michigan

dyximan wrote:

Big #/little# squared/2 Is this the simple form

Exactly. I thought about presenting it that way but felt like an example would be more easily understood!

dyximan

I appreciate the efforts of all in helping me to Understand the number of stops. Now I just have to determine how many coatings and types. filter elements, and blades should be in each lens lol.