Wide angle advice

[Jonathan-Mac]

What is the "clear aperture rule"?

 

[inspiredtimothy]

Excellent Xavier, I love well executed merged photos. LR mobile doesn't do this which is a severe limitation when you hear me banging on about just using a phone.

Merging also has advantages over a wider lens and it shows in your photo. Software is far better at this now too so this is something I literally forgot to do in the mountains a few weeks ago and I used to regularly use it and get mmmmmehhhh results with old Lightroom versions.

Close up like yours you have to be aware of parallax error but the software is probably correcting this now also.

Noted for the to do list. It is good for Milky Way and astro images too where you can use, for example a fast 50mm to gather much more light than wide angles even at same apertures (the clear aperture rule). Also a far higher MP image bettering even 100MP medium format cameras. Skill/technique to compensate for expensive equipment or equipment you don't have is very satisfying.

At the risk of going off topic, what is the clear aperture rule?

Edit: Jonathan beat me to it

 

[xaviergut]

I managed to do a 65:24 version of the las picture with the "perspective" option to merge:

• Panasonic - DC-S5M2X
• LUMIX S 35/F1.8
• 35.0 mm
• ƒ/1.8
• 1/60 sec
• Pattern
• Auto exposure
• ISO 160

I had to erase some people and it is not perfect but... it is what it is.

Here the 35mm normal version without merging:

• Panasonic - DC-S5M2X
• LUMIX S 35/F1.8
• 35.0 mm
• ƒ/1.8
• 1/60 sec
• Pattern
• Auto exposure
• ISO 250

 

[Oíche]

At the risk of going off topic, what is the clear aperture rule?

Edit: Jonathan beat me to it

God damn it's the most understood thing in photography, I feel like saying google it but can be a rabbit hole.

Basically it is the area opened by the aperture blades to the sensor.

My Samyang 14mm f2.8 has a 14/2.8 = 5mm diameter opening.

A 56mm f2.8 lens has 56/2.8 = 20mm diameter opening capturing a smaller amount of view.

56mm is a 4x crop, 4^2 is 1/16th the area

Pi radius squared area formula with pi being constant means 5mm^2 = 25mm, 20mm^2 = 400mm... 400/25 = 16x the opening to sensor.... Coincidentally gathering 16x the amount of light from 1/16th of the area.

Yip it's a head wrecker but that is tge essense of clear aperture.

It means using my 24-105 f4 @ 24mm f4 gathers more light than my Samyang 14mm f2.8 I used on APS-C to only give up 3mm on that combo. I've seen some great Milky Way photos done with the 24-105 BTW and same is possible if you own the 20-60

There were and hopefully still are threads on dpreview astro forums about this with input from a NASA engineer who did astro landscapes in the Serengeti and his choice was a 35mm f1.4 and used lots of mergers for a wider field as opposed to a 14mm or something.

Enjoy the confusion

 

[RuleOfThirds]

Anyway, my trade-in lenses are packed up and going to the seller of the 16-35 But really love the S Pro 16-35, and I might like the output of this lens even beter then the 24-105

 

[Nevyn72]

Anyway, my trade-in lenses are packed up and going to the seller of the 16-35 But really love the S Pro 16-35, and I might like the output of this lens even beter then the 24-105

Until you oogle your next lens

 

[RuleOfThirds]

Until you oogle your next lens

Well luckily Oogle didn’t have any lenses