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Perthshire at it's best
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Re: Perthshire at it's best
Both great compositions The second has a bit more zing to it and a touch of brightness to the first should make it just as nice.
I notice both are at f20 which is very slow which has a bearing on the need for such slow shutters on both and the high ISO of one. You'd probably have been better off at f8 (AKA "The Sweet Spot") which would have permitted a lower ISO and faster shutter. That's all just technicalities to help improve the next pictures as these don't appear to have suffered as they're already very nice indeed
Cheers,
John
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Re: Perthshire at it's best
Originally posted by Daisy M View PostThanks John, you know I am a newbie, would having a lower f number affect my d of f ?
The downside of a small aperture is that it lets in far less light so the shutter speed must be slowed (making subject blur a possibility) or a higher ISO needed which risks 'noise'. These three settings you have at your command (Shutter, Aperture and ISO) are known as "The Exposure Triangle" and learning how they interact is easier now we use digital as it's simply a case of taking lots of experimental images at different settings to see the effect they have.
This may help too: < here >
Cheers,
John
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Re: Perthshire at it's best
Lovely colours David. I would have taken this shot using TV 125-160,auto AV, ISO 400;auto WB. Other experienced members would also advise.
I personally find it very helpful to know details of your equipment and perhaps you might like to add it on the signature field below.Canon 6D; Canon 760D;Canon G15;Canon 40mm f2.8(Pancake);Canon 50mm f1.8(ii); Canon 17mm-40mm f4L;Canon EF-S 10-18mm f4.5-5.6 IS STM;Canon EF-S 55-250mm f4-5.6 STM lens;Canon 24mm-105mmf4L IS;Canon 70-300mm f4-f5.6 L IS USM;Kenko 1.4x HD TC;Canon 430EX ii flash;Giottos tripod;Manfretto monopod;Cokin P filters + bits and pieces!
www.flickr.com/photos/nathaniel3390
North Wales where music and the sea give a great concert!
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Re: Perthshire at it's best
There is another neglected issue with regard to stopping down the aperture and that's the massive loss in resolution that occurs. Any APS-C (crop) sensor camera will resolve far more poorly below F11 and is generally best at f5.5 - f8. With full frame sensors you have about one stop more before the effect is as noticeable. Resolution is generally measured in line widths per picture height (LW/PH) which doesn't have to mean anything so long as you know that the higher the number, the better the resolution. I've copied some figures from a test of the Canon 100 mm macro, i.e. a very good lens with high resolving power. Centre resolution at f5.6 LW/PH = 2445, f8 = 2368, f11 = 2196, f16 = 2057, f22 = 1504. In other words, at f22 the resolution is only 61% of what it is at f5.6. This fall off is typical of every lens, many are worse, it's down to the laws of physics and there is very little lens designers can do about it. Most lenses don't go below f16 for that reason. A lot of people still seem to think that by using a smaller aperture they get better resolution because the depth of field is greater, but that isn't the case. When people used large or medium format film cameras, they would set f32 or f64 without problem, but the smaller the film or sensor the greater the problem of diffraction becomes. It's something to be wary of if your equipment doesn't seem to be giving the resolution you expect and is one reason why f8 is often the "sweet spot" for lenses.EOS 6D, 6D Mk II, 80D, 70D, 100D, 200D, M50, M100. Canon 10-18, 18 - 55, 55 - 250 IS STM lenses, Canon 16 - 35 mm F4L, 35 mm EF-S macro, 50 mm F1.8 STM, 60 mm EF-S macro, MPE-65 macro, 85 mm F1.8, 200 mm F2.8 L II, M 15 - 45 mm, M 22mm F2, M 32mm F1.4. Sigma 24 - 35 F2 Art, 135 mm F1.8 Art, 17 - 50 F2.8 DC, 105 mm OS macro, 100 - 400 C, 150 - 600 C.
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Re: Perthshire at it's best
If you have a smartphone there are plenty of apps that will help with calculating DOF and determining the hyperfocal distance.
If this is a term you haven't heard of there is plenty of info on the web that will explain how this can help you achieve good DOF.Canon 5D3, 7D2, 60D, Canon 70-200L f2.8 IS II, Canon 300 f4L IS, Canon 16-35 f4 L, Canon 24-105mm f/4L IS USM, Canon 1.4 MkIII extender, Sigma AF 10-20mm f/3.5 EX DC HSM, Sigma 150-600 Contemporary, Tamron SP AF 70-300 F/4-5.6 Di VC USD, Canon EF-S 18-55mm 1:3.5-5.6 IS
https://www.flickr.com/photos/16830751@N03/
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Re: Perthshire at it's best
Ok, see your first image was taken at 75mm. Now if you use this focal length on your 700D and use f8 as recommended the hyperfocal distance is approx 40m then the DOF would extend from just under 20m all the way to infinity.Canon 5D3, 7D2, 60D, Canon 70-200L f2.8 IS II, Canon 300 f4L IS, Canon 16-35 f4 L, Canon 24-105mm f/4L IS USM, Canon 1.4 MkIII extender, Sigma AF 10-20mm f/3.5 EX DC HSM, Sigma 150-600 Contemporary, Tamron SP AF 70-300 F/4-5.6 Di VC USD, Canon EF-S 18-55mm 1:3.5-5.6 IS
https://www.flickr.com/photos/16830751@N03/
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Re: Perthshire at it's best
If you need to control depth of field, which generally you do for all but action photography where fast shutter is the priority, then Av is probably the best mode in my opinion....you just need to make sure the camera doesn't select a shutter speed so slow that camera shake spoils the image.
As a rule of thumb on an average dull day f5.6 125th/sec ISO100 is going to give a reasonable exposure - and good to keep in mind - from this datum point you can judge if Av mode whether the shutter will be fast enough before you have to resort to raising the ISO.Brian Vickers LRPS
brianvickersphotography.com
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Re: Perthshire at it's best
Here's an online DOF calculator
This Depth of Field (DoF) calculator will help you get the creative control on the design of your photos. Decide the zone of sharpness you need to tell the story you want and get your message across.
There are loads of others
And here is an interactive tool so you can play with different settings and see the effect on DOF
Canon 5D3, 7D2, 60D, Canon 70-200L f2.8 IS II, Canon 300 f4L IS, Canon 16-35 f4 L, Canon 24-105mm f/4L IS USM, Canon 1.4 MkIII extender, Sigma AF 10-20mm f/3.5 EX DC HSM, Sigma 150-600 Contemporary, Tamron SP AF 70-300 F/4-5.6 Di VC USD, Canon EF-S 18-55mm 1:3.5-5.6 IS
https://www.flickr.com/photos/16830751@N03/
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