Andy01

In Av mode with fixed ISO, the shutter speed changes - unless you max out at 1/4000th and you have safety shift enabled, then it changes the ISO as well. At least that is my experience. I suspect ...

Is that why you posted the same thread twice - one for each bag :-) Colin

Sorry what ? Reducing the ISO by 3 stops from 800 to 100 would reduce the light by 3 stops, and then slowing the shutter by 3 stops (1/4000 - 1/2000 - 1/1000 - 1/500) allows 3 stops more light in ...

Based on the shorter tusks of the elephants and white rhinos I would suggest South Africa (maybe Kruger), but the tree might suggest either Zimbabwe or Botswana. A bit unusual to see white rhinos ...

I am a little different. I got my M5 (not M50) while I still had a 70D and now a 6D ii, and I will always reach for my DSLR unless I am wanting to travel light. On a recent 3 week trip traveling ...

Agree with above. Just curious - why would you use ISO 800 and 1/4000th shutter speed ? You may get better results at ISO 100 and 1/500th, which would give the same exposure. Colin

Is the lens faulty ? I initially used my old 24-105L with my 6D ii with no problems. One of the areas of improvement with the 24-105L ii (compared to Mk i) is IS - now 4 stops vs about 2 to 2½ stops. ...

Have you checked the micro focus adjustment of the 5D ii with the lenses ? Colin

I am another fan of Sirui. I have the N2204X CF, which is too big / solid for your needs, but well made and reasonably priced, and unlike Manfrotto, has standard arca swiss. A smaller version like ...

Some quite bad star distortion in the corners there, but it is 11mm which may be better for APS-C than 14mm. Colin

Be cautious with the Sigma 17-50mm f2.8. I bought one with my 600D and 70D, and the lens gave unpredictable focus results, in spite of my best effort s to do MFA. Sometimes it was spot on and very ...

I bought a cheap $7 pair from Aldi supermarket and they worked quite well on my 6D ii touchscreen. Not perfect - a little more fiddly on the small menu selections (but not really a touchscreen ...

No it doesn't. I bought a tempered glass one on eBay, fitted perfectly, went on very easily with no bubbles, and works a treat. I cannot remember the brand name. Colin

You may get a more specific (to astro) response in the astro forum. As mentioned above, concerns like coma don't interest general users much, but it is important for astro. Colin

R2 Not arguing with the maths. Just pointing out that even a movement of 1mm or so on the focus ring of a MF lens (taking it from infinity to very close to infinity, or just past infinity) can make ...

I am happy with the Samyang 14mm f2.4 XP - it is a nice metal body, smooth focus ring and sharp. I am really curious to know what you are photographing with a UWA that you require such a small MFD ? ...

I think the need for astro rules out either of the Canons, and the need for a first-time-right rules out the cheap Samyang/Rokinon, so from you list, you are left with the Tokinas, which often get ...

I suspect that the OP's need might have passed in the 3½ years since the question was posted. Colin

I would think that a lot more info might be required to make anything more than a vague guess. Where are you going ? How much and for how long do you intend to shoot ? Do you use any power saving ...

I would think that it mostly depends on whether you thing you will need the extra 50mm reach of the 18-135mm, or the extra 3mm at the wide end of the 15-85mm, and only you can decide that. I would ...