Jump to content

Sagitar

Gold Member
  • Content Count

    2,648
  • Joined

  • Last visited

  • Days Won

    60

Sagitar last won the day on June 30

Sagitar had the most liked content!

Community Reputation

94 Excellent

About Sagitar

  • Rank
    Dedicated Club Poster

Previous Fields

  • Vehicle
    Mitsubishi Outlander GX4hs

Profile Information

  • Gender
    Male
  • Location
    Ampthill, Bedfordshire
  • Interests
    Archery and photography

Recent Profile Visitors

1,021 profile views
  1. No. It's quite a long way from the house. I'm just being selfish and not wanting my view over the trees to change . . . .
  2. Thanks fellahs. I'm not the slightest bit concerned about the crane; it's temporary and will be gone in time. What I am worried about is the thought that an ugly multi-storey apartment block will shortly creep up above the tree line along the ancient lime avenue that I walk frequently. The new block is replacing a police station (we don't have any resident coppers now) that was set low down and was only two storeys. The new place covers more ground and will be three storeys and a pitched roof.
  3. Some firm has started to build retirement apartments in a field not far from us. This week they installed a crane on the site and it's clearly visible from the front of our house. We have had some good sunsets this week so after they had parked the crane for the night I took the chance to take some pics. Example below.
  4. It's the competitive urge Tony. Otherwise you might as well say why bother with anything that exceeds the speed limit? I don't know why I'm arguing. I have long since lost any interest in going faster.
  5. In 1935 the world land speed record was taken beyond 300 mph. Sir Malcolm Campbell reached 301.13 mph in the Railton Rolls-Royce Bluebird on Daytona Beach. The engine was a 36.7 litre supercharged V12 generating 2269 hp. Now that speed is exceeded and sustained in a road-legal sports car. I think that is impressive.
  6. Like Rich, I wouldn't otherwise have noticed, so thanks for the "heads up". I use the pumps so infrequently that I have difficulty remembering how to do it . . . . :-)
  7. If you take a single image as close up as this one is then only a small band will be in focus i.e. there is a very small depth of field. If you move the camera forward a little and take another image it will again have only a small band in focus but it will be a different band than in the first image. Do the same and again and again for a large number of images each with a different small band in focus. Now use some clever software to select all the bands that are in focus and merge them into a single image that is all in focus. That's what we call image stacking and focus merging. Here is a single image from the stack that I used. You can see how little of it is in focus.
  8. Here is another, more typical stacked image. It's compiled from 50 individual images.
  9. You need to tell me what you mean by the bokeh effect. My understanding of bokeh concerns the way in which out-of-focus areas are rendered. Different lenses give more or less pleasing renderings of out-of-focus areas. One of the key factors in bokeh is the extent to which the opening in the iris approximates to a circle. Generally, the more blades in the iris and the more it will give an opening that approximates to a circle, but the curvature of the edge of the blade also plays a part. Focus stacking can be carried out with lenses that have good or bad bokeh characteristics. Only the rendering of the out-of-focus background will be affected. The key advantage of focus stacking is the huge increase in depth of field that is achieved.
  10. One of the nice features of Affinity is focus stacking. It works very simply. Focus stacking uses multiple images of an object with a small shift of focus in each image. It's particularly helpful in macro photography and it enables the photographer to get the whole of a subject in focus by merging multiple images. Affinity has a very neat function for merging the multiple images. The painful part of this technique used to be the production of the multiple images. It needed a focusing rack on which the camera was mounted so that you could move the camera by a series of small increments taking a picture after each movement. Having taken enough pictures to cover the distance from front to back of the subject, the pics would be merged in software to get a single picture in which the whole of the subject is in focus. Recently some cameras (including my FUJI XT3) have provided a function that automatically takes a series of pictures with the focusing plane moved for each picture. The example below shows a focus merged picture taken at a distance of about 500mm with an 80mm macro lens. The focus merged pic is made from about twenty individual images, starting with an image focused on the knurled ring at the front of the camera and finishing at the rearmost visible part of the subject. I think you can see that the whole of the subject is sharp, but the background is completely out of focus.
  11. Rich beat me to it. I would have used identical words.
  12. . . . . . and interesting when it rains.
  13. The black background is our TV (switched off of course). I was using a trial version of Affinity when I processed the picture of the Orchid, but I've bought it now. It was when I read about Adobe's intention to prevent me from using software that I had paid for that I decided it was time to go elsewhere.
  14. The orchid reached full bloom and I thought I ought to take some pics before it goes over. I've been playing with some new photo software called Affinity. I'm still learning how to use it and I'm not nearly as adept at using it as I am with Photoshop. The PS subscription has become far too expensive for the amount of processing that I do now so I need to find something else. I think Affinity could be what I need but the learning curve might be long and steep . . . .
×
×
  • Create New...