{"id":14835,"date":"2021-12-12T09:39:47","date_gmt":"2021-12-11T20:39:47","guid":{"rendered":"https:\/\/www.tonywhitehead.com\/wildlight\/?p=14835"},"modified":"2021-12-12T09:41:11","modified_gmt":"2021-12-11T20:41:11","slug":"image-degradation-when-using-extension-tubes-with-nikkor-z-mc-105mm-macro-lens-part-2","status":"publish","type":"post","link":"https:\/\/www.tonywhitehead.com\/wildlight\/archives\/14835","title":{"rendered":"Image Degradation when using Extension Tubes with Nikkor Z MC 105mm Macro lens – Part 2"},"content":{"rendered":"\n
\"\"<\/a>
Photo with Nikkor Z 105mm MC S and Viltrox extension tubes using a macro rail – note smearing at the edges of the frame<\/figcaption><\/figure><\/div>\n\n\n\n

Following on from my first post on this image degradation with extension tubes issue<\/a>, I have had a chance to compare the effect of in-camera focus shift stacks with stacks shot by moving the camera on a macro rail. As I mentioned in the initial post, in-camera stacks change focus incrementally and this alters the magnification between shots slightly. When assembled in Helicon Focus, the software applies adjustments for this. I felt that these adjustments may be more marked peripherally and what was introducing some artifact that was causing the image degradation.<\/p>\n\n\n\n

Focus stacks shot using a macro rail keep focus and thus magnification constant and the rig is just incrementally advanced through the image to achieve sharply focused slices at different points of the subject. As can be seen from the top image this did not solve the peripheral image degradation problem. It is arguably slightly less marked than in the in-camera focus stack shown below but still gives unusable definition at the edges.<\/p>\n\n\n\n

\"\"<\/a>
Focus shift stacked image with 36mm extension showing smearing\/blurring of the image edges<\/figcaption><\/figure><\/div>\n\n\n\n

A crop from the top image shows poor sharpness of the hook at the end of the spider leg.<\/p>\n\n\n\n

\"\"<\/a>
Crop from first photo showing poor peripheral detail<\/figcaption><\/figure><\/div>\n\n\n\n

Placing the subject of interest more centrally in the frame allows far better sharpness and detail preservation.<\/p>\n\n\n\n

\"\"<\/a>
Focus stack reframed to place leg tip more centrally<\/figcaption><\/figure><\/div>\n\n\n\n

Crop from above image showing detail of the hooks and comb at spider leg tip.<\/p>\n\n\n\n

\"\"<\/a>
Good sharp detail from centre of focus stacked image<\/figcaption><\/figure><\/div>\n\n\n\n

In summary this issue with using Viltrox extension tubes with the Nikkor Z 105mm f2.8 MC S lens seems to be related to the lens\/extension tube combination rather than an artifact introduced by in-camera focus stacks and Helicon Focus. My conclusion from the first post stands – I will limit extension tube use to those occasion when I need more “magnification” than I can achieve with the lens alone and cropping. When I use tubes I will accept that I will need to crop out the periphery of the image anyway. The qualification again is that this is a worst case scenario using maximum extension of 36mm. The 12mm and 24mm tubes alone will likely cause less of an issue but I have not yet tested this adequately.<\/p>\n","protected":false},"excerpt":{"rendered":"

Image Degradation when using Extension Tubes with Nikkor Z MC 105mm Macro lens – Part 2. Do focus stacks shot using a macro rail solve the problem?<\/p>\n","protected":false},"author":1,"featured_media":14838,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":"","jetpack_publicize_message":"Image Degradation when using Extension Tubes with Nikkor Z MC 105mm Macro lens - Part 2. Do focus stacks shot using a macro rail solve the problem?","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[256],"tags":[259,956,258,827,931,915,869,933,609,932],"class_list":["post-14835","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-macro","tag-extension-tube","tag-image-degradation-with-extension-tubes","tag-macro","tag-macro-photography","tag-nikkor-z-mc-105mm","tag-nikon-macro","tag-nikon-z","tag-nikon-z-extension-tubes","tag-nikonnz","tag-viltrox-extension-tubes","entry","has-media"],"yoast_head":"\nImage Degradation when using Extension Tubes with Nikkor Z MC 105mm Macro lens - Part 2 - WildLight Photography<\/title>\n<meta name=\"description\" content=\"Image Degradation when using Extension Tubes with Nikkor Z MC 105mm Macro lens - Part 2. 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Adapting perspective and lighting","rel":"","context":"In "Fungi"","block_context":{"text":"Fungi","link":"https:\/\/www.tonywhitehead.com\/wildlight\/archives\/category\/fungi"},"img":{"alt_text":"Blue mushroom on the forest floor","src":"https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2025\/05\/BlueMushrooms-20250503-NZ7_0871-BR1S1-2-web.jpg?fit=960%2C768&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2025\/05\/BlueMushrooms-20250503-NZ7_0871-BR1S1-2-web.jpg?fit=960%2C768&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2025\/05\/BlueMushrooms-20250503-NZ7_0871-BR1S1-2-web.jpg?fit=960%2C768&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2025\/05\/BlueMushrooms-20250503-NZ7_0871-BR1S1-2-web.jpg?fit=960%2C768&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":14654,"url":"https:\/\/www.tonywhitehead.com\/wildlight\/archives\/14654","url_meta":{"origin":14835,"position":5},"title":"Camouflage of Garden Orbweb Spiders","author":"tony","date":"November 28, 2021","format":false,"excerpt":"Garden Orbweb Spider (Eriophora pustlosa)at rest on a Yucca stem showing excellent camouflage Following on from my Backyard Macro Safari post I have been spent a bit of time trying to locate the daytime resting places of some of the spiders that share my habitat to demonstrate the camouflage of\u2026","rel":"","context":"In "biology"","block_context":{"text":"biology","link":"https:\/\/www.tonywhitehead.com\/wildlight\/archives\/category\/biology"},"img":{"alt_text":"Focus shift image stack of Garden Orbweb Spider","src":"https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2021\/09\/OrbRose-NZ7_7090-HeliconStack-ed-web.jpg?fit=960%2C640&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2021\/09\/OrbRose-NZ7_7090-HeliconStack-ed-web.jpg?fit=960%2C640&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2021\/09\/OrbRose-NZ7_7090-HeliconStack-ed-web.jpg?fit=960%2C640&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.tonywhitehead.com\/wildlight\/wp-content\/uploads\/2021\/09\/OrbRose-NZ7_7090-HeliconStack-ed-web.jpg?fit=960%2C640&ssl=1&resize=700%2C400 2x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/posts\/14835","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/comments?post=14835"}],"version-history":[{"count":0,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/posts\/14835\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/media\/14838"}],"wp:attachment":[{"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/media?parent=14835"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/categories?post=14835"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tonywhitehead.com\/wildlight\/wp-json\/wp\/v2\/tags?post=14835"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}