{"id":340155,"date":"2024-10-19T23:49:40","date_gmt":"2024-10-19T23:49:40","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-iso-14490-42005\/"},"modified":"2024-10-25T22:58:56","modified_gmt":"2024-10-25T22:58:56","slug":"bs-iso-14490-42005","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-iso-14490-42005\/","title":{"rendered":"BS ISO 14490-4:2005"},"content":{"rendered":"<p>This part of ISO&nbsp;14490 is applicable to amateur astronomical telescopes.<\/p>\n<p>For general optical test methods of telescopic systems see ISO&nbsp;14490-1.<\/p>\n<h4>PDF Catalog<\/h4>\n<table border=\"1px\" class=\"des-table\">\n<tr>\n<th>PDF Pages<\/th>\n<th>PDF Title<\/th>\n<\/tr>\n<tr>\n<td><b>9<b><\/td>\n<td>Figure 1 \u2014 Measurement of the focal lengths of objective lens or eyepiece  <\/td>\n<\/tr>\n<tr>\n<td><b>10<b><\/td>\n<td>4.2.2 Focal length of objective mirror (method using a microscope with illuminator) <br \/> The test method described below does not apply to objective mirrors with central obscuration. <br \/> 4.2.2.1  As shown in Figure 2 a), mount the objective mirror to be measured on the rotary table in front of <br \/> 4.2.2.2  Move the microscope with illuminator to the position where the image of the reticle can be seen  <\/td>\n<\/tr>\n<tr>\n<td><b>11<b><\/td>\n<td>Figure 2 \u2014 Measurement of focal length of objective mirror  <\/td>\n<\/tr>\n<tr>\n<td><b>12<b><\/td>\n<td>4.3 Resolution <br \/> 4.3.1 Resolution of main telescope <br \/> 4.3.2 Resolution of finder telescope  <\/td>\n<\/tr>\n<tr>\n<td><b>13<b><\/td>\n<td>5 Test report <br \/> Figure 3 \u2014 Test target and example of resolution test of main telescope  <\/td>\n<\/tr>\n<tr>\n<td><b>14<b><\/td>\n<td>Bibliography  <\/td>\n<\/tr>\n<tr>\n<td><b>16<b><\/td>\n<td>BS ISO <br \/> BSI \u2014 British Standards Institution <br \/> Revisions <br \/> Buying standards <br \/> Information on standards <br \/> Copyright  <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p><b>Optics and optical instruments. Test methods for telescopic systems &#8211; Test methods for astronomical telescopes<\/b><\/p>\n<table class=\"shortdes-table\" style=\"width: 100%\" border=\"0\" cellspacing=\"0\" cellpadding=\"0\">\n<tbody>\n<tr>\n<td>Published By<\/td>\n<td>Publication Date<\/td>\n<td>Number of Pages<\/td>\n<\/tr>\n<tr>\n<td><a href=\"https:\/\/pdfstandards.shop\/product-category\/publishers\/bsi\/\"><b>BSI<\/b><\/a><\/td>\n<td>2006<\/td>\n<td>16<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":340160,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-340155","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/340155","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/340160"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=340155"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=340155"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=340155"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}