Messages

1

Feature Requests / Re: Request: Dense Cloud Filtering

« on: April 14, 2014, 09:26:26 AM »

+1 for me. marcel explains the reasoning perfectly.

I've been thinking about this the last few weeks, and the reason why I feel Dense Cloud Filtering is important is because currently we have no way to predict how many points the Dense Cloud phase creates. It takes 20+ hours to process, and only afterward you see if it has the right number of points. If it does not have enough points then we don't have the detail we need, if it has too many points then meshing it becomes really hard.

Being able to reduce the number of points in the Dense Cloud would make it so much easier. If the reduction is done in a smart way (with only redundant points being removed) then this would improve quality  because we could always build the Dense Cloud at the maximum level without having to be afraid of un-meshable Clouds.

2

General / Re: RAW, JPG and different types of noise

« on: March 04, 2013, 12:16:43 PM »

You just saved me hours if not weeks of research. Thankyou so much!

3

General / Re: Sharpness and focal length

« on: February 15, 2013, 02:29:05 AM »

Excellent. That's good to know. I've been shooting my photo's currently with IS on. I'll give the tape a go and do a few tests at 30, 35 and 50.

I'm still curious about if the extra sharpness from the more expensive lenses would help. I'm always tempted to go for the expensive glass, but when you start talking about buying multiple camera's. 1 L glass = 3 cheapies.

Has anyone tried multiple camera's using different lenses? Would it hurt your results using a 1.2 50mm @f8 on what camera and 1.8 50mm @f8 on another? I've tried 1 handheld with multiple focal lengths and that really doesn't solve well.

4

General / Re: Sharpness and focal length

« on: February 14, 2013, 07:10:56 AM »

Hmmm..good suggestion. Not sure how keen I am to gaffer my lens though. I hear you can tighten some screws under the zoom ring as well which helps but again, not too keen on messing with my lens for now.

I'd still be keen to hear other peoples thoughts about focal lengths with a crop sensor.

5

General / Sharpness and focal length

« on: February 14, 2013, 04:32:37 AM »

I've been trying to research this as much as I can before posting this but I haven't found as much information as I would have liked specifically regarding photoscan.

Currently I have invested in a Canon 60D and a 24-105mm lense for recreational purposed. I'm now using this camera for Photoscan and would like to invest in a prime lens. From what I understand a 50mm lense on a full frame sensor is the best way to go to get great results.

I'd like to know what the best set up for a crop sensor is. I know that the sigma f1.4 30mm equats to ~48mm and the Canon f2.0 35mm  works out to be ~55mm. Mean while your 50mm lenses come to about 70mm. Which is more appropriate? Does it matter? Personally I would like to go the Sigma 30mm or Canon 35mm as I have limited room, but if it's going to hurt  my results I'd rather spend the money on a 50mm.

Also a question on sharpness. Would the difference in sharpness between a Canon f1.8 50mm @ f8 and a Canon f1.4 50mm @ f8 make a noticable difference to my results?

http://www.astrosurf.com/buil/50mm/test_us.htm

I'm hoping to get a bit of clarification on this before I start spending money on the lenses and testing with my 24-105 is difficult because it doesn't have a zoom lock and the focal length slips over time (v frustrating)

Also any recommendation for lenses would be much appreciated.

Cheers,

Greg