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deivydas

macrumors member
Sep 28, 2014
80
125
Vilnius, Lithuania
They are for full sized digital cameras like Nikon and Canon. That Nikon 105mm f/1.4 retails for $2199.00 and when shot wide open, the results look like this: (this is not my shot, but someone else's sample)


View attachment 662339

Come on, we don't need another "DSLR experience is better" offtopic :) We all know it, but this topic is about iPhone 7 plus :)
 

Minhimalism

macrumors 6502a
Jan 6, 2012
997
141
Texas
d637059fba18cc4cfb95ef61c48c02f3.jpg
 
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gtg465x

macrumors 6502a
Sep 12, 2016
754
883
That's not the case here. The tele is f2.8 and the wide is f1.8. It simply has a smaller aperture.

f/2.8 is smaller than f/1.8. Just like 1/4 is smaller than 1/2. And I know that an f/1.8 lens lets in more light and is thus is better in low light than an f/2.8 lens. So what are you trying to tell me?

Aperture-f-Number.png


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uh no. canon makes 400mm f2.8, a 200mm f2, a 200mm f1.8, a 300mm f2.8 a 70-200 f2.8 and plenty other companies make a f2.8 or better with telephoto or super telephoto options.

the only time you'll get faster than 1.8 is if you go less than 100mm, which is still better than the mediocre camera on the iPhone 7

I was speaking in general terms, not stating an absolute rule. In general, if you're looking at lenses in the same price range and quality, the longer the zoom, the slower it will be (the less light it will let in). Of course you can find telephoto lenses that match or beat some wide angle lenses, if those telephoto lenses are like 5 times the price of the wide angle lenses.
 
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itsray

macrumors 6502
Jun 5, 2016
474
326
Not anymore.

nikon_af_s_nikkor_105mm_f_1_4e_1269658.jpg



and if it doesn't have to be faster than f/1.8

canon_200_f1-8.jpg
\

The top lens is new for 2016; the bottom lens is actually discontinued,

i was actually talking about the 85 and 50 1.2... thats what i meant by fast.



this was done with a canon. not even a fast one but better than an iPhone 7
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f/2.8 is smaller than f/1.8. Just like 1/4 is smaller than 1/2. And I know that an f/1.8 lens lets in more light and is thus is better in low light than an f/2.8 lens. So what are you trying to tell me?

Aperture-f-Number.png


[doublepost=1475474889][/doublepost]

I was speaking in general terms, not stating an absolute rule. In general, if you're looking at lenses in the same price range and quality, the longer the zoom, the slower it will be (the less light it will let in). Of course you can find telephoto lenses that match or beat some wide angle lenses, if those telephoto lenses are like 5 times the price of the wide angle lenses.


i know my stuff. i was just trying to say to the person that focal length doesnt matter. if you have the money you can buy fast glass.
 

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gtg465x

macrumors 6502a
Sep 12, 2016
754
883
It's a ratio.

f stop= focal length/diameter of entrance pupil.

(Camera lens are compound lenses. In a compound lens system, the entrance pupil is the optical image of the aperture, as seen from outside the camera. The aperture is physically smaller than this, and is magnified by the front elements.)

Increase the focal length, and you need to increase the size of the entrance pupil to compensate. That's why cheap zoom lenses tend to be faster at the wide end, and slower at the long end. But if you can pay for the glass, you can get fast telephoto lenses with much larger entrance pupils.

So..

The iphone 7 plus has a 4mm lens and a 6.6 lens.
The 4mm lens is f/1.8. That means that the entrance pupil has a diameter of 2.2 mm.
The 6.6mm lens is f2.8. That means that the entrance pupil has a diameter of 2.35mm

The 6.6mm lens has the larger of the two entrance pupils. It has the smaller fstop, because it's not that much larger.

That's what I meant. Longer lens... smaller f/stop (bigger number below the f/)... generally.
 

itsray

macrumors 6502
Jun 5, 2016
474
326
That's what I meant. Longer lens... smaller f/stop.

unless you want 1.2 then no. unless you have the money. not everyone needs 1.2. it produces a really shallow depth of field. unless you're doing astro stuff way out where theres no light pollution then not many people need it. maybe if you do portraits but if you do you stop it down.


theres a .95 lens. its crap even in low light and its all manual. there a canon 50mm 1.0 that hasn't been made since the 90's that people still want. its only good if you like that look, not a lot of people like it, its more of an artistic look
 

gtg465x

macrumors 6502a
Sep 12, 2016
754
883
unless you want 1.2 then no. unless you have the money. not everyone needs 1.2. it produces a really shallow depth of field. unless you're doing astro stuff way out where theres no light pollution then not many people need it. maybe if you do portraits but if you do you stop it down.


theres a .95 lens. its crap even in low light and its all manual. there a canon 50mm 1.0 that hasn't been made since the 90's that people still want. its only good if you like that look, not a lot of people like it, its more of an artistic look

Think you replied to the wrong person.
 

Setarip

macrumors member
Sep 11, 2016
46
39
unless you want 1.2 then no. unless you have the money. not everyone needs 1.2. it produces a really shallow depth of field. unless you're doing astro stuff way out where theres no light pollution then not many people need it. maybe if you do portraits but if you do you stop it down.


theres a .95 lens. its crap even in low light and its all manual. there a canon 50mm 1.0 that hasn't been made since the 90's that people still want. its only good if you like that look, not a lot of people like it, its more of an artistic look


The problem with faster lenses is that the DOF decreases. On my Minolta using the 1.4 lens the DOF is razor thin. When you get even faster it starts to get interesting.
 

pixelements

macrumors regular
Nov 18, 2013
156
124
Germany
Here are few of mine. Portrait-Mode needs a lot of improvement. Sometimes it works good, but sometimes the edges look awful! All in all, I'm really impressed with the new iPhone camera. I had to scale down the pictures by 50% to upload them, so the quality might be bad now.
 

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SoN1NjA

macrumors 68020
Feb 3, 2016
2,073
2,184
Here are few of mine. Portrait-Mode needs a lot of improvement. Sometimes it works good, but sometimes the edges look awful! All in all, I'm really impressed with the new iPhone camera. I had to scale down the pictures by 50% to upload them, so the quality might be bad now.
May I have IMG_0086 in full size? It looks amazing!
 

ohms12

macrumors 6502
Jun 21, 2012
338
142
Scotland
f/2.8 is smaller than f/1.8. Just like 1/4 is smaller than 1/2. And I know that an f/1.8 lens lets in more light and is thus is better in low light than an f/2.8 lens. So what are you trying to tell me?

Yeah I know, but the longer the lens the smaller the aperture. They go together.

Just the 'absolute' nature of your comment. Implying that because the tele is longer it must be worse in low light. It's worse in low light because of the smaller aperture, not because its focal length is longer.
 

28Fiend

macrumors member
Apr 29, 2009
98
1
5280
I've been an Android user for the past 8 years and haven't had an iPhone for more than a few days since owning the iPhone 3G years ago. I decided to make the switch from a Nexus 6P to the iPhone 7 to see what all the fuss is about and I must say, of all the features the iPhone 7 touts, the camera is absolutely blowing me away. I snapped these pictures this morning. (click to enlarge)

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Rocky Mountain National Park? Pikes Peak possibly?
 
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hekoheko

macrumors newbie
Sep 17, 2016
6
22
With the normal lens that is stabilized you need atleast 1/10th or faster shutter speed to get sharp photo. But the tele is 56mm and needs atleast 1/50th to 1/60th shutter speed to get sharp shot, because it doesn't have OIS. And in order to get to 1/50th shutter the ISO needs to go higher. Thats the effect of focal lenght to low light photography.
 

sn0warmy

macrumors 6502a
Mar 26, 2009
630
75
Denver, CO
Rocky Mountain National Park? Pikes Peak possibly?

Guanella Pass, just outside of Georgetown. If you haven't made your way up there yet, I HIGHLY recommend doing it this week. The trees are perfect up there right now. My pictures hardly do it justice since the cars were the main focus of the trip.
 
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