![\"http:\/\/www.bungaycameraclub.org.uk\/images\/agorapro\/attachments\/964\/E14-4868.jpg\"](\"http:\/\/www.bungaycameraclub.org.uk\/images\/agorapro\/attachments\/964\/E14-4868.jpg\")
<\/a><\/p>\nI have experimented with this and managed to remove a lot of the green cast by adjusting the raw image with the raw image converter and exporting the resultant image (in this version as a jpg file – I have also tried tiff files):<\/p>\n
As you can see, most of the green cast has gone, along with most of the blue sky. However, I took a 3-exposure HDR set and got the following result using as input the 3 processed raw files which were exported as jpg files:<\/p>\n This is beginning to look like a more natural image, but it could do with a bit of tweaking:<\/p>\n Here, I have managed to recover the blue sky and recoloured the green grass. Not a bad result considering the state of the original images.<\/p>\n But what use is such a filter? I see two main uses:<\/p>\n Now I have got the basics covered, I will give these a try.<\/p>\n Postscript:<\/strong><\/p>\n How did I fix the welding glass to a lens? I didn’t want to risk cutting the glass so I attached it to an old Cokin filter holder:<\/p>\n For this, I used ‘Chemical Metal’ as an adhesive to attach the filter to the front of the filter holder – this makes an almost permanent fixing. I then used black ‘Sugru’ (brilliant stuff!) to fill the gaps top and bottom to reduce the risk of glare from the sun – this is shown in close-up below:<\/p>\n And this is what it looks like attached to the camera:<\/p>\n Increasing exposure times – Big Stopper I have been trying out a cheap version of a ‘Big Stopper’ (very dense) filter by using welding glass. Unfortunately, it gives a deep green cast to the image: I have experimented with this and managed to remove a lot of the green cast by adjusting the raw image … Continue reading “Trying out a cheap ‘big stopper’ filter using welding glass”<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69,65],"tags":[],"class_list":["post-3776","post","type-post","status-publish","format-standard","hentry","category-photo-diy","category-technical"],"_links":{"self":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3776","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3776"}],"version-history":[{"count":1,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3776\/revisions"}],"predecessor-version":[{"id":3777,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=\/wp\/v2\/posts\/3776\/revisions\/3777"}],"wp:attachment":[{"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3776"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=3776"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.pmstudios.co.uk\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=3776"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}<\/a><\/p>\n<\/a><\/p>\n<\/a><\/p>\n\n
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